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Features of Metal Slewing Bearings

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Metal slewing bearings are extensively applied in numerous industrial sectors and serve as crucial components for enabling smooth rotational motion of equipment parts. They possess distinctive structural and performance characteristics, with both prominent advantages and disadvantages.

What is Metal Slewing Bearing?

Metal slewing bearings play an irreplaceable role in various industrial fields, owing to their high load – bearing capacity, high – precision rotation capabilities, reliable stability, and long service life. However, their drawbacks, such as high costs, large weight, and complex installation and maintenance procedures, limit their application in certain scenarios. With the continuous advancement of technology, it is anticipated that in the future, metal slewing bearings will overcome these limitations while maintaining their advantages through means like material innovation and process improvement, thereby achieving broader applications.

Advantages of metal slew bearing

High Load – Bearing Capacity,The structural design of metal slewing bearings allows them to endure diverse types of loads, including axial forces, radial forces, and overturning moments. Take large – scale cranes as an example. When hoisting heavy objects, the slewing bearing has to bear the axial force generated by the combined weight of the boom and the load, the radial force resulting from sway during the hoisting process, and the overturning moment caused by the load’s eccentricity. The raceways and rolling elements of the slewing bearing are crafted from high – strength metal materials and undergo specialized processing techniques, such as surface quenching. This enhances the material’s hardness and wear resistance, ensuring that the slewing bearing can operate stably even under complex stress conditions, boasting a formidable load – bearing capacity. Small – sized metal slewing bearings can have an axial load – bearing capacity of up to several tens of kilonewtons, while large – scale ones can withstand thousands of kilonewtons or even higher axial forces. The slewing bearings of some large – scale port cranes can have an overturning moment – bearing capacity exceeding tens of thousands of newton – meters.

High – Precision Rotation,in precision equipment, the high – precision rotation feature of metal slewing bearings is of utmost importance. For instance, in semiconductor manufacturing equipment, an extremely high level of positioning accuracy for components is required. The manufacturing process of slewing bearings is continuously optimized. The processing accuracy of the raceways can reach the micron level, and the dimensional accuracy and roundness of the rolling elements are strictly controlled. Additionally, the internal structure of the slewing bearing is rationally designed to effectively minimize axial and radial run – out during operation, guaranteeing high – precision positioning of equipment components during rotation. Generally, the rotational accuracy of metal slewing bearings can be maintained within ±5 arc – minutes, and that of high – precision ones can even be controlled within approximately ±1 arc – minute, meeting the high – precision demands of precision equipment.

Reliable Stability,the stability of metal slewing bearings stems from their robust metal structure and excellent sealing design. In harsh industrial environments, such as those with high temperatures, high humidity, or heavy dust, the metal housing of the slewing bearing can effectively resist external impacts and corrosion. The internal sealing device prevents impurities like dust and moisture from infiltrating, protecting the raceways and rolling elements from erosion and ensuring their normal operation. For example, in the large – scale rotary kiln equipment of cement plants, metal slewing bearings can operate stably even when exposed to a dusty environment for an extended period. This reduces equipment malfunctions and boosts production efficiency.

Reliable Stability,the metal materials chosen for metal slewing bearings exhibit good wear resistance and fatigue resistance. Under normal usage and maintenance conditions, they have a relatively long service life. In wind turbines, although the slewing bearings are exposed to complex outdoor weather conditions over an extended period, through rational material selection, regular lubrication, and maintenance, their service life can reach 20 years or even longer. This not only reduces the equipment’s maintenance costs but also extends the overall service cycle of the equipment, minimizing the impact of frequent component replacements on production.

Disadvantages of metal slew bearing

High Costs,the high costs of metal slewing bearings are mainly attributed to materials and processing. To ensure high load – bearing capacity and a long service life, high – quality alloy steels, such as those containing alloying elements like chromium and molybdenum, are typically selected. These materials are expensive. During the processing stage, the high – precision requirements render the processing technology complex. Advanced processing equipment and testing instruments, such as high – precision grinders and coordinate measuring machines, are necessary, driving up the production costs. The price of small – sized metal slewing bearings can range from several thousand yuan, while that of large – scale, high – precision slewing bearings can reach hundreds of thousands of yuan or even higher. This undoubtedly increases the overall manufacturing costs of the equipment.

Large Weight,since metal slewing bearings are predominantly composed of metal materials, they are relatively heavy. In some application scenarios with strict weight constraints, such as the aerospace industry, an overly heavy slewing bearing will increase the overall weight of the aircraft, affecting its flight performance and energy consumption. Even in ground – based equipment, such as small – scale construction machinery that requires frequent movement, an excessively heavy slewing bearing will increase the difficulty of equipment movement and energy consumption, reducing the equipment’s mobility and operational efficiency.

Complex Installation and Maintenance,The installation of metal slewing bearings demands professional skills and equipment, with high – precision installation requirements. During installation, parameters such as the levelness and concentricity of the slewing bearing must meet the specified standards; otherwise, it will affect its normal operation and service life. When installing giant slewing bearings in large – scale bridge construction, large – scale lifting equipment and high – precision measuring instruments are needed. The installation process is complex and time – consuming. Routine maintenance is also rather cumbersome. It is necessary to regularly inspect the lubrication condition and wear level of the slewing bearing, and promptly replenish lubricants and replace worn – out components. The maintenance of some large – scale slewing bearings requires the operation of professional technicians, increasing the maintenance costs and difficulties.

Prices of Metal Slewing Bearings

The prices of metal slewing bearings vary significantly due to multiple factors. Small, ordinary ones may cost a few hundred yuan, such as those used in small – scale machinery with low – precision requirements. Medium – sized ones usually cost around several thousand yuan and are suitable for general industrial equipment. Large – scale, high – precision, or those made of special materials and with unique manufacturing processes can cost tens of thousands of yuan or even more. For example, slewing bearings used in high – end equipment like wind power and offshore engineering. The specific price needs to be determined by comprehensively considering factors such as materials, dimensions, and precision.

Suppliers of Metal Slewing Bearings

Since its establishment, Ldb bearing Company has always stood out with its unique excellence. Rooted in Luoyang, Henan Province, a thriving hub for the bearing industry, the company has leveraged its professional design and R&D capabilities to produce numerous high – quality products. The company offers a wide range of product specifications. Whether they are standard or non – standard products, they all showcase exquisite craftsmanship. From the procurement of raw materials to the production of finished products, strict process control and quality management are implemented at every step.

Effects of Low Temperature on Slewing Bearings

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The effects of low temperature on slewing bearings involve multiple aspects. These effects can seriously threaten the normal operation of equipment. By choosing appropriate solutions, the performance and reliability of slewing bearings in low – temperature environments can be effectively improved.

What is Low – Temperature Slew Bearing?

As a key component for various mechanical equipments to achieve rotational motion between components, slewing bearings are widely used in equipment such as cranes, wind turbines, and tunnel boring machines. In low – temperature environments, the performance and reliability of slewing bearings face many challenges. In – depth understanding of these effects and taking effective solutions are crucial for ensuring the normal operation of equipment and extending its service life.

Effects of Low Temperature on Slewing Bearings

Changes in Material Properties

Low temperature can alter the properties of the metal materials used in slewing bearings. Most metal materials become brittle at low temperatures, with a significant reduction in impact toughness. Taking commonly used bearing steel as an example, in a low – temperature environment, the crystal structure inside the material changes, making it difficult for dislocations to move. This greatly reduces the material’s ability to resist impact loads. When the equipment starts at low temperatures or is impacted during operation, the raceways, rolling elements, and other components of the slewing bearing are more prone to cracks. In severe cases, fractures may even occur, greatly affecting the load – bearing capacity and service life of the slewing bearing.

Decrease in Lubrication Performance

Low temperature seriously affects the lubrication effect of slewing bearings. Lubricating oil increases in viscosity and becomes less fluid at low temperatures, making it difficult to form a good oil film between the raceways and rolling elements. This not only increases the frictional resistance, resulting in increased energy consumption during equipment operation, but also exacerbates the wear between components. Under extremely low – temperature conditions, the lubricating oil may even solidify, completely losing its lubricating function. This causes the wear of the slewing bearing to rise sharply, affecting the rotational accuracy of the equipment and leading to unstable equipment operation, which cannot meet the working requirements.

Deterioration of Sealing Performance

The sealing device of slewing bearings is also affected by low temperatures. Sealing materials usually have a certain elasticity to ensure good sealing performance. However, in a low – temperature environment, the sealing materials harden, become brittle, and their elasticity decreases, resulting in reduced sealing performance. External impurities such as moisture and dust can easily penetrate into the interior of the slewing bearing, contaminating the lubricating oil and accelerating the corrosion and wear of components. If the moisture freezes after entering, it may also damage the sealing structure, further deteriorating the working environment of the slewing bearing.

Changes in Fitting Accuracy Caused by Thermal Expansion and Contraction

Each component of the slewing bearing undergoes dimensional changes due to thermal expansion and contraction at low temperatures. Different materials have different thermal expansion coefficients, which may affect the fitting accuracy between components. For example, the clearance between the raceway and the rolling elements may become smaller, increasing friction and wear. If the clearance is too large, it will affect the rotational accuracy, causing vibration and noise during equipment operation. In addition, thermal expansion and contraction may also cause the connections between the slewing bearing and other equipment components to loosen, affecting the overall stability of the equipment.

Solutions to Cope with the Effects of Low Temperature

Selection of Appropriate Materials

To cope with the low – temperature environment, materials with good low – temperature performance should be selected for manufacturing slewing bearings. For raceways and rolling elements, alloy steels containing elements such as nickel and manganese can be used. These alloying elements can effectively improve the low – temperature toughness of the material and reduce the brittle transition temperature of the material. For slewing bearings used in some extremely cold regions, special low – temperature alloy materials such as nickel – based alloys can also be considered. These materials can still maintain good mechanical properties at low temperatures. For seals, low – temperature – resistant rubber or plastic materials such as fluororubber and silicone rubber should be selected. These materials can maintain good elasticity and sealing performance at low temperatures.

Optimization of the Lubrication System

In response to the problem of reduced lubrication performance at low temperatures, the lubrication system of the slewing bearing needs to be optimized. First, lubricating oil with excellent low – temperature performance should be selected. It has a low pour point and a high viscosity index and can still maintain good fluidity at low temperatures. For example, polyalphaolefin (PAO) lubricating oil in synthetic lubricating oils performs better than mineral lubricating oils in low – temperature environments. Second, heating or heat – preservation devices can be used to increase the temperature of the lubricating oil to ensure its normal flow at low temperatures. In some large – scale equipment, a lubricating oil heating system can be installed to preheat the lubricating oil before the equipment starts. For small – scale equipment, heat – preservation materials can be used to wrap the lubricated parts to reduce heat loss.

Improvement of the Sealing Structure

To improve the sealing performance of slewing bearings at low temperatures, the sealing structure can be improved. A multi – layer sealing design can be adopted to increase the reliability of the seal. For example, multiple sealing lips can be set between the inner and outer rings of the slewing bearing, and sealant can be filled between the sealing lips to prevent the intrusion of external impurities. In addition, the seals should be regularly inspected and replaced to ensure their good performance. In a low – temperature environment, the aging rate of seals accelerates, so more attention needs to be paid to the maintenance of seals.

Compensation for the Effects of Thermal Expansion and Contraction

To compensate for the impact of thermal expansion and contraction on the fitting accuracy of slewing bearings, the thermal expansion coefficients of materials should be fully considered in the design stage, and the fitting clearances between components should be reasonably designed. Methods such as reserving clearances or adjusting shims can be used to ensure the normal fitting between components in a low – temperature environment. During the equipment installation and commissioning process, the fitting clearance of the slewing bearing should be adjusted according to the actual ambient temperature. The fitting accuracy of the slewing bearing can also be regularly detected to timely discover and solve problems caused by thermal expansion and contraction.

Price of Low – Temperature Slew Bearings

The prices of Low – Temperature Slew Bearings are affected by multiple factors. Material is one of the important factors. Special steels that can maintain their performance in low – temperature environments are required, and the high cost leads to an increase in price. The manufacturing process is also crucial. High – precision processing technology and strict quality control ensure the stability and reliability of the bearings at low temperatures, which increases the production cost and leads to a relatively high price. In terms of specifications and dimensions, special – specification or large – size Low – Temperature Slew  Bearings are difficult to produce, and their prices will also increase accordingly.

Supplier of Low – Temperature Slew Bearings

Since its establishment, Ldb bearing Company has always shone with a unique luster. Rooted in Luoyang, Henan Province, a fertile ground for the bearing industry, the company has created many high – quality products with its professional design and R & D capabilities. The company’s product specifications are rich and diverse. Whether they are standard products or non – standard products, they all demonstrate exquisite craftsmanship. From the entry of raw materials into the factory to the output of finished products, strict process control and quality management are implemented at every step.

What kind of Slew bearings can withstand high temperature?

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In the field of modern industry, numerous production processes involve high-temperature environments. In the high-temperature scenarios, ordinary bearings struggle to function properly. Thus, bearings capable of withstanding high temperatures have emerged. These bearings enable equipment to operate stably in high-temperature environments.

What are High-Temperature Slew Bearings?

The primary characteristic of High-Temperature Slew Bearings is their excellent high-temperature resistance. They can maintain structural stability and mechanical properties for extended periods in high-temperature environments. Their materials are usually special alloys, such as alloy steels containing elements like chromium, molybdenum, and vanadium. These alloys can form a dense oxide film at high temperatures, preventing further oxidation and maintaining material strength. For example, at a high temperature of 1000°C, some nickel-based alloy bearing materials can still maintain high hardness and strength, meeting the operational requirements of equipment.

High-Temperature Slew Bearings also require a reliable lubrication system. Ordinary lubricating greases are prone to evaporation and carbonization at high temperatures and cannot provide lubrication. High-Temperature Slew Bearings often use high-temperature-resistant solid lubricants, such as molybdenum disulfide and graphite. These can form a lubricating film at high temperatures, reducing the coefficient of friction. Some High-Temperature Slew Bearings are also equipped with a forced lubrication system, which uses circulating and cooled lubricating oil to dissipate heat and ensure lubrication effectiveness.

Main Types and Characteristics

Ceramic Bearings

Ceramic bearings are outstanding among High-Temperature Slew Bearings. Commonly used ceramic materials include silicon nitride and silicon carbide. These ceramic materials have a low density, approximately one-third that of metals, which can effectively reduce the weight of equipment. They have extremely high hardness, with the hardness of silicon nitride ceramics reaching 2000 – 3000 HV, much higher than that of metals, and excellent wear resistance. In high-temperature environments, ceramic bearings have good chemical stability, are not prone to reacting with other substances, and have strong oxidation resistance. For example, in the high-temperature furnace equipment of the glass manufacturing industry, ceramic bearings can operate stably at around 1500°C, reducing maintenance costs and improving production efficiency. However, ceramic bearings are relatively brittle, prone to damage in impact environments, and have high processing difficulty and costs.

High-Temperature Alloy Bearings

High-temperature alloy bearings use nickel-based and cobalt-based alloys as their main materials. These alloys contain multiple alloying elements such as chromium, molybdenum, and tungsten. They have good oxidation resistance and thermal strength at high temperatures and can withstand high temperatures and heavy loads. Nickel-based alloy bearings can operate normally at 800 – 1000°C and are commonly used in critical components such as aircraft engines and gas turbines. High-temperature alloy bearings have good strength and toughness and can adapt to complex working conditions. However, the alloy composition is complex, resulting in high manufacturing costs.

Self-Lubricating Bearings

Self-lubricating bearings achieve self-lubrication by adding solid lubricants to the metal matrix. Commonly used solid lubricants include molybdenum disulfide and polytetrafluoroethylene. In high-temperature environments, the solid lubricant in this type of bearing can slowly release and form a lubricating film on the friction surface, reducing friction and wear. In the continuous casting equipment of the metallurgical industry, self-lubricating bearings can operate stably in high-temperature, high-load, and difficult-to-lubricate environments, reducing maintenance frequency and improving equipment operation reliability. However, the self-lubricating performance of self-lubricating bearings weakens over time, and lubricants need to be replaced or replenished regularly.

Application Fields

In the aerospace field, parts such as engine combustion chambers and turbines are exposed to extremely high temperatures. The performance of High-Temperature Slew Bearings directly affects the safety and performance of aircraft. For example, High-Temperature Slew Bearings in aircraft engines need to operate at temperatures above 1200°C, withstanding high speeds and heavy loads. Ceramic bearings and high-temperature alloy bearings meet these requirements with their excellent performance, ensuring the stable operation of engines.

In the metallurgical industry, High-Temperature Slew Bearings are widely used in various heating furnaces, rolling mills, and other equipment. During the steel rolling process, the roll bearings need to withstand huge pressure and friction at 500 – 800°C. High-temperature alloy bearings and self-lubricating bearings can adapt to such harsh working conditions, ensuring the continuity of steel rolling production and product quality.

Equipment such as furnaces and annealing furnaces in the glass manufacturing industry also rely on High-Temperature Slew Bearings. In the stirrers and discharge devices of glass furnaces, ceramic bearings can operate stably near high-temperature glass melts at 1400 – 1600°C, preventing metal impurities from contaminating the glass and improving the quality and production efficiency of glass products.

With the continuous development of industrial technology, High-Temperature Slew Bearings also have new application requirements in emerging fields such as new energy and electronic manufacturing. In the concentrator tracking devices of solar thermal power generation systems, High-Temperature Slew Bearings need to operate for long periods in high-temperature and harsh outdoor environments. In high-temperature process equipment for semiconductor manufacturing, High-Temperature Slew Bearings must meet the requirements of high precision and low pollution.

High-Temperature Slew Bearings are indispensable in modern industry. Different types of High-Temperature Slew Bearings have their respective advantages and disadvantages. In practical applications, the appropriate bearing type needs to be selected according to specific working conditions and requirements. With the continuous progress of materials science, manufacturing processes, and lubrication technologies, the performance of High-Temperature Slew Bearings will continue to improve, and their application fields will be further expanded, providing more reliable support for industrial production in high-temperature environments.

Price of High-Temperature Slew Bearings

The price of High-Temperature Slew Bearings are affected by multiple factors. The material is a key factor. High-performance, high-temperature-resistant special alloy materials have high costs, resulting in high prices. In terms of accuracy levels, high-precision High-Temperature Slew Bearings have complex manufacturing processes and are more expensive than ordinary-precision ones. Regarding specifications and dimensions, large-sized or special-specification High-Temperature Slew Bearings are difficult to produce, and their prices will increase accordingly. Market supply and demand relationships also affect prices. When supply is in short supply, prices rise, and when there is an oversupply, prices fall.

Supplier of High-Temperature Slew Bearings

Ldb bearing company has always stood out since its establishment. It is rooted in Luoyang, Henan, a fertile ground for the bearing industry. With its professional design and R&D capabilities, it has created numerous high-quality products. The company offers a wide range of product specifications, and both standard and non-standard products showcase exquisite craftsmanship. From the incoming inspection of raw materials to the output of finished products, strict process control and quality management are implemented at every step.

The Application and Development of Slew bearings in Agricultural Machinery

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The slewing support is a crucial component of mechanical machinery. It can withstand multiple forces and enable slewing motion. It is widely used in harvesters and tractors, which can improve agricultural production efficiency and quality, and promote the intelligent upgrading of agricultural machinery.

What is Slew bearing?

Slew bearing is an important mechanical component widely used in various large – scale mechanical devices. It is similar to a large – scale bearing structure, mainly composed of an inner ring, an outer ring, rolling elements, and a cage. The slew bearing can withstand axial forces, radial forces, and overturning moments simultaneously, enabling stable rotational motion of mechanical device components. For example, in a tower crane, the slew bearing allows the jib to rotate flexibly for lifting and transporting goods. In a wind turbine, it helps the nacelle to turn with the wind direction.

Applications of Slew bearings

The application of slew bearings in harvesters is particularly crucial. Take the combine harvester as an example. During the process of harvesting crops, its cutter head needs to be adjusted in angle and rotated frequently. The slew bearing is installed between the cutter head and the machine body. It bears the weight of the cutter head and provides stable support and precise rotation for its slewing. Thanks to the slew bearing, the cutter head can swing flexibly from side to side, accurately adapting to different terrains and crop growth conditions. When encountering irregular fields, the cutter head can quickly adjust its angle with the help of the slew bearing, ensuring the continuity and efficiency of the harvesting operation, and avoiding crop leakage due to untimely angle adjustment, thus greatly improving the harvesting efficiency and quality.

In addition, the slew bearing also plays an indispensable role in the threshing and cleaning system of harvesters. The threshing drum and the cleaning sieve need to perform rotational motion within a certain range to achieve effective threshing and precise cleaning of crops. The slew bearing provides a stable rotational foundation for these components, ensuring the smooth operation of the threshing and cleaning process. At the same time, it can also withstand the impact load generated by the uneven distribution of crop materials, extending the service life of the threshing and cleaning system and reducing maintenance costs.

As a general – purpose machine in agricultural production, the slew bearing also plays an important role in enabling the functions of tractors. When a tractor is working in the fields, the front – end farm tools such as plows and harrows need to be adjusted in angle and position according to different tillage requirements. The slew bearing is installed between the tractor and the farm tools, allowing the farm tools to rotate flexibly up, down, left, and right. During plowing operations, the driver can easily adjust the plowing angle and depth of the plow by operating the control device with the help of the slew bearing to adapt to different soil conditions and tillage depth requirements. This precise adjustment improves the quality of plowing, making the soil looser and more conducive to crop growth.

In the transportation operations of tractors, the slew bearing also facilitates the turning of trailers. When a tractor is towing a trailer on field paths or rural roads, the slew bearing allows the trailer to follow the tractor’s turning flexibly, improving the vehicle’s driving stability and maneuverability and reducing the risk of traffic accidents caused by inflexible turning.

The Promotional Role of Slew bearings in Agriculture

The application of slew bearings has promoted agricultural modernization in many aspects. In terms of production efficiency improvement, slew bearings make the operation actions of agricultural machinery more flexible and precise, greatly shortening the operation time. The rapid slewing and angle adjustment of the harvester’s cutter head can increase the harvesting speed, enabling crops to be harvested within the optimal harvest period and reducing food losses caused by untimely harvesting. The precise adjustment of tractor farm tools also improves tillage efficiency, accelerating the progress of field operations and providing strong support for large – scale agricultural production.

Slew bearings are also essential for improving the quality of agricultural production. They ensure the stability and accuracy of agricultural machinery during operation, reducing damage to crops caused by unstable mechanical movement. For example, during the threshing process of harvesters, the slew bearing ensures the smooth rotation of the threshing drum, avoiding excessive碾压 of grains and improving the quality of the grain. When the tractor is plowing, the precise control of the tillage depth and angle achieved through the slew bearing creates a better growth environment for crops, helping to increase crop yields and quality.

From the perspective of agricultural industry upgrading, the application of slew bearings has promoted the intelligent and automated development of agricultural machinery. With the continuous progress of science and technology, slew bearings are combined with sensors and control systems to achieve automated control of agricultural machinery operations. For example, on some high – end combine harvesters, by installing angle sensors and control systems, the slewing angle of the cutter head can be automatically adjusted according to the distribution of crops, realizing intelligent harvesting. Such intelligent agricultural machinery not only improves production efficiency but also reduces dependence on labor, promoting the transformation and upgrading of the agricultural industry towards modernization and intelligence.

However, the application of slew bearings in agricultural machinery also faces some challenges. The agricultural operation environment is complex, and dust, soil, moisture, etc. can easily corrode and wear slew bearings, affecting their service life and performance. At present, the protective designs of some slew bearings used in agricultural machinery are not perfect enough and need to be further improved. At the same time, with the rapid development of agricultural modernization, higher requirements are placed on the performance and reliability of slew bearings. Some existing slew bearing products still need to be continuously improved in terms of load – bearing capacity and accuracy retention.

To address these challenges, R & D and production enterprises of slew bearings need to increase their technological innovation efforts. On the one hand, develop more advanced materials and surface treatment processes to improve the corrosion – resistance and wear – resistance of slew bearings. For example, use new corrosion – resistant alloy materials or special coating technologies to extend the service life of slew bearings in harsh agricultural environments. On the other hand, strengthen the optimization of the structural design of slew bearings to improve their load – bearing capacity and accuracy retention, meeting the continuously upgraded performance requirements of agricultural machinery.

The Price of Slew bearings

The price of slew bearings is affected by multiple factors. The material is crucial. Using corrosion – resistant materials such as stainless steel and special alloys increases the cost and thus the price. High – precision processed slew bearings also have a higher price due to the strict requirements for processes and equipment. In addition, brand influence also plays a role. Well – known brand products have more guaranteed quality and after – sales service, and their prices are often on the high side. Market supply and demand relationships also matter. When the supply is in short supply, the price rises, and when the supply exceeds the demand, the price drops.

Supplier of Slew bearings

LDB Bearing Company is a shining star in the bearing industry! Since its establishment in 1999, with its unremitting efforts and innovative spirit, it has grown from obscurity to become well – known in the industry. The bearing products it produces are of excellent quality. For example, its spur – gear slewing drive has high precision and strong stability and is widely used in many fields, injecting strong impetus into industrial production. Moreover, the company has passed the ISO9001:2015 quality management system certification of TUV Germany, ensuring product quality with strict standards. With high – quality products and attentive services, it has won the trust of customers in 73 countries and regions around the world and is bound to create more glories in the future!

How to Prevent Rust from Damaging slew Bearings

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The performance and lifespan of bearings are crucial to the operation of equipment. Rust poses a threat to the reliability and lifespan of bearings. Rust can damage the lubricating film, intensify friction, and affect the rotational accuracy and stability.

What is a Slewing Bearing?

A slewing bearing is an essential device that enables mechanical components to achieve rotational motion. It is widely used in various types of mechanical equipment. It typically consists of a slewing support, a drive device, a sealing system, etc. The slewing support, as a fundamental part, can withstand axial forces, radial forces, and overturning moments, ensuring the stable rotation of the equipment. The drive device provides power for rotation. Commonly, a combination of a motor and a reducer is used, which drives the slewing support to rotate through methods such as gear transmission. For example, in a tower crane, the rotation of the jib during operation relies on the slewing bearing. In the field of industrial robots, slewing bearings help robots move flexibly. It is the key to the normal operation of many large – scale and complex mechanical devices.

The Principle of Rust’s Damage to Bearings

Rust is essentially an iron oxide. When the iron on the surface of a slew bearing reacts chemically with oxygen and water in the air, rust is formed. Rust has a loose texture and a larger volume than iron, which can cause local stress concentration on the bearing surface and damage the bearing’s lubricating film. As rust continues to form and accumulate, it will intensify the internal friction of the bearing, raise the bearing temperature, and accelerate the aging and deterioration of the lubricant. At the same time, rust particles may become embedded between the rolling elements, raceways, and cages of the bearing, causing wear and pitting, which seriously affects the rotational accuracy and operating stability of the bearing.

Measures to Prevent Rust Damage

Material Selection

Choose Corrosion – Resistant Materials: During the design and selection stage, prioritize the use of corrosion – resistant bearing materials. For example, stainless – steel bearings have good corrosion – resistance and are suitable for working environments that are humid or contain corrosive gases or liquids. Common stainless steel materials such as 304 and 316 are used. Among them, 316 stainless – steel has better corrosion – resistance due to the addition of molybdenum, making it particularly suitable for use in harsh corrosion environments such as marine environments or chemical production.

Apply Surface Coating Materials: Surface coating treatment of bearings made of ordinary steel is also an effective way to improve their corrosion – resistance. Common coatings include galvanizing, nickel – plating, chromium – plating, etc. The galvanized layer can form a dense protective film on the bearing surface, effectively isolating oxygen and moisture. The nickel – plated layer can not only enhance the corrosion – resistance of the bearing but also improve its appearance quality and surface hardness. The chromium – plated layer has high hardness and wear – resistance, which can strengthen the anti – wear and anti – corrosion capabilities of the bearing surface.

Storage and Transportation

Control of Storage Environment: When storing bearings, place them in a dry and well – ventilated warehouse. The relative humidity of the warehouse should be kept at a low level, generally recommended to be no more than 60%. Dehumidifying equipment can be installed to maintain the stability of the humidity in the warehouse. At the same time, avoid placing bearings near windows, doors, or other locations where they are easily invaded by humid air. For bearings in long – term storage, it is best to use sealed packaging and place desiccants, such as silica gel desiccants, inside the packaging to further absorb the moisture in the package and prevent rust from forming.

Transportation Protection Measures: During the transportation of bearings, take good protective measures. Avoid exposing bearings directly to humid air. Sealed packaging boxes can be used for packaging. For bearings in long – distance transportation or sea transportation, to prevent the erosion of seawater moisture, anti – rust bags or anti – rust paper can be placed inside the packaging box. These anti – rust materials can release anti – rust gases, forming a protective film on the bearing surface to prevent rust. At the same time, pay attention to the bumps and collisions during transportation to prevent the bearing surface from being more prone to rust due to mechanical damage.

Installation and Use

Inspection and Treatment Before Installation: Before installing a bearing, carefully inspect its appearance to ensure that there are no rust marks or damages on the surface. If there are slight rust spots on the bearing surface, a special rust remover can be used for treatment. After rust removal, clean and lubricate the bearing with clean lubricating oil before installation. During the installation process, ensure that the installation tools and the installation environment are clean to avoid impurities from entering the bearing and scratching the bearing surface, which may cause rust.

Operation Environment Management: During the use of bearings, keep the operating environment of the equipment clean and dry. For equipment operating in humid environments, protective measures such as installing protective covers and sealing devices can be taken to prevent moisture and dust from entering the bearings. At the same time, regularly maintain and service the equipment, and promptly clean the dust and dirt on the equipment surface to avoid their accumulation and absorption of moisture, which may lead to rust on the bearings. In addition, control the temperature and humidity during the operation of the equipment to avoid the formation of condensate on the bearing surface due to excessive temperature changes.

Lubrication and Maintenance

Select Appropriate Lubricants: High – quality lubricants can not only reduce the friction and wear of bearings but also have anti – rust functions. Select appropriate lubricants according to the working conditions and environment of the bearings. In humid environments, lubricating greases with good anti – rust properties, such as lithium – based lubricating grease, can be selected. It has good water – resistance and anti – rust properties. For high – speed rotating bearings, lubricating oils with low viscosity and good anti – oxidation properties should be selected, and an appropriate amount of anti – rust additives should be added to enhance the anti – rust ability.

Regular Lubrication and Replacement: Lubricate the bearings regularly according to the equipment’s operating instructions. When adding or replacing lubricants, ensure that the old lubricants are completely removed to prevent impurities and moisture in the old lubricants from corroding the bearings. At the same time, pay attention to the service life of the lubricants and replace expired or deteriorated lubricants in a timely manner to ensure their anti – rust and lubrication performance.

Monitoring and Maintenance

Establish a Monitoring Mechanism: Utilize modern monitoring technologies such as vibration monitoring and temperature monitoring to understand the operating status of bearings in real – time. By analyzing vibration signals and temperature changes, it is possible to promptly detect whether there are abnormal wear or overheating phenomena in the bearings, and then determine whether factors such as rust affect the bearing performance. Once abnormalities are detected, take timely measures to deal with them.

Regular Maintenance and Inspection: Develop a reasonable maintenance and inspection plan and regularly disassemble and inspect the bearings. Check for rust marks on the bearing surface, wear conditions, and the state of the lubricant. For minor rust marks found, deal with them in a timely manner. For bearings with severe wear or rust, replace them in a timely manner to avoid causing greater damage to the equipment.

Preventing rust from damaging bearings requires taking comprehensive and effective measures from multiple aspects, including material selection, storage and transportation, installation and use, lubrication and maintenance, and monitoring and maintenance. Only in this way can the erosion of rust on bearings be minimized, the lifespan of bearings be extended, the normal and stable operation of mechanical equipment be ensured, the maintenance costs and downtime of equipment be reduced, and the production efficiency and economic benefits of enterprises be improved.

The Price of Slewing Bearings with Rust – Prevention Capabilities

The price of slewing bearings with rust – prevention capabilities is influenced by multiple factors. In terms of materials, using corrosion – resistant materials such as stainless steel and special alloys, or applying high – quality anti – rust coatings will increase the cost and thus raise the price. In terms of processing, high – precision machining and advanced surface treatment processes can improve rust – prevention performance and quality, but the large investment also drives up the price.

Supplier of Slewing Bearings

LDB Bearing Company is a leading enterprise in the bearing industry with remarkable strength. Since its establishment in 1999, it has worked hard from obscurity and has become a mainstay in the industry with its dedication to quality and enthusiasm for innovation. The products developed and manufactured by the company are widely used in many fields. Among them, the spur – gear slewing drive has high precision and good stability, which significantly improves the operation performance of industrial welding robots. Moreover, the company attaches great importance to product quality, strictly adheres to high standards, and has passed the ISO9001:2015 quality management system certification of TUV Germany. With its excellent quality and high – quality services, its products are sold to 73 countries and regions around the world, winning the trust of customers. It is bound to lead the industry to new heights in the future.

The Application of Recyclable Materials in Bearing Manufacturing

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The bearing manufacturing industry is exploring the use of recyclable materials to achieve sustainable development. The application forms include the recycling and reuse of metals, plastics, and composite materials.

What is Slewing Bearing Using New Materials?

A slewing bearing using new materials is manufactured with materials possessing special properties, building upon traditional designs. For example, carbon fiber composite materials with high strength and low density can reduce its own weight while enhancing load – bearing capacity, making them suitable for weight – sensitive fields such as aerospace. Self – lubricating materials are also used. These materials eliminate the need for frequent lubricant addition, reducing maintenance costs and pollution. They are commonly used in slewing bearings for food processing machinery. These new materials enable slewing bearings to perform better in terms of accuracy, corrosion resistance, and service life, meeting the requirements of modern industry for high – performance, long – lasting, and low – maintenance equipment, and driving the renewal and upgrading of mechanical equipment in various industries.

Application Forms of Recyclable Materials in Bearing Manufacturing

Recycling and Reuse of Metal Materials

Metal materials play a significant role in bearing manufacturing. Steel is one of the most commonly used materials for bearing manufacturing. Scrap steel has a wide range of sources, such as scrapped automobiles and mechanical parts. By recycling this scrap steel and subjecting it to processes like sorting, smelting, and refining, steel that meets the requirements of bearing manufacturing can be obtained again. For instance, after smelting, the impurities in recycled scrap steel are removed, and its chemical composition is adjusted. Then, through processes like rolling, steel for bearing rings and rolling elements can be produced. This recycling and reuse method can not only reduce the environmental damage caused by iron ore mining but also lower the energy consumption in the steel production process.

In addition to steel, non – ferrous metals such as copper and aluminum are also used in bearing manufacturing, for example, in manufacturing components like cages. Waste copper and aluminum products, such as discarded electrical wires and cables, and aluminum cans, can be processed through specific recycling processes. Recycled copper, after refining to remove impurities, can be used to manufacture high – precision bearing cages. Its good electrical and thermal conductivity helps improve the performance of bearings. Recycled aluminum, after melting and processing, can be made into aluminum alloy cages, which have the advantages of light weight and high strength and play an important role in some bearing application scenarios with strict weight requirements.

Recycling and Utilization of Plastics and Composites

In modern Slew bearing manufacturing, plastics and composites are also widely used in manufacturing components such as seals and cages. Recycled plastics, such as discarded plastic bottles and pipes, can be processed into recycled plastic pellets through processes like crushing and granulation, and then used to manufacture bearing seals and some cages. For example, polyamide (PA) plastic is commonly used to make bearing cages. Recycled PA plastic can be re – processed and formed into cages with excellent performance after treatment.

The recycling of composites is relatively complex but also of great significance. Some high – performance bearings are made of carbon fiber – reinforced composite materials, which are high in strength and low in weight. For discarded carbon fiber composite products, the carbon fibers can be separated from the matrix materials through methods such as pyrolysis and chemical dissolution, and then reused to manufacture new composite components, or mixed with other materials to manufacture bearing components with slightly lower requirements, thus achieving the recycling of resources.

Challenges in Using Recyclable Materials

Material Performance Consistency Issues

Recyclable materials come from a wide range of sources with varying qualities, resulting in significant differences in their properties. For example, recycled scrap steel may contain different types and amounts of impurities. Even after refining, it is difficult for its chemical composition and mechanical properties to be exactly the same as those of virgin materials. These performance differences can affect the quality and reliability of bearings, such as causing uneven hardness and reduced fatigue life of bearings.

For plastics and composites, degradation and aging during the recycling process can change their properties. Recycled plastics may experience a decrease in molecular weight and a decline in mechanical properties, which poses challenges for manufacturing high – precision and high – performance bearing components. Ensuring the consistency of the performance of recycled materials is one of the key issues in the application of recyclable materials in bearing manufacturing.

Recycling Costs and Economic Benefits

Recycling recyclable materials and processing them into raw materials suitable for bearing manufacturing requires certain investment. This includes the costs of collection, transportation during the recycling process, as well as subsequent costs of sorting, smelting, refining, and processing. For example, the smelting process of recycling scrap steel consumes a large amount of energy and requires high – quality equipment, which increases the recycling cost.

In terms of economic benefits, if the cost of recycled materials is too high and the price advantage of the manufactured bearing products in the market is not obvious, enterprises may find it difficult to obtain sufficient profits. Therefore, enterprises need to comprehensively consider factors such as the selection of recycled materials, the optimization of recycling processes, and product pricing to find a balance between recycling costs and economic benefits.

Technical and Process Difficulties

The use of recyclable materials in bearing manufacturing requires corresponding technical and process support. Currently, the processing technologies for some recycled materials are not mature enough to meet the high – precision requirements of bearing manufacturing. For example, for waste metal materials containing multiple impurities, existing refining technologies may not be able to completely remove all impurities, affecting the purity and performance of the materials.

For the recycling of composites, the lack of efficient and low – cost separation technologies makes recycling difficult. In addition, processing recycled materials into components that meet the requirements of bearing manufacturing requires the improvement and innovation of existing manufacturing processes. For example, when using recycled plastics to manufacture bearing seals, new molding processes need to be developed to ensure the dimensional accuracy and sealing performance of the seals.

Strengthening Material Testing and Quality Control

Establish a strict material testing system to conduct comprehensive and detailed tests on recycled materials. Before recycled materials enter the production process, test their chemical composition, mechanical properties, impurity content, and other indicators, and classify and screen them according to the test results. For materials with significant performance differences, take corresponding treatment measures, such as secondary refining of recycled steel to adjust its chemical composition to meet the standards of bearing manufacturing.

During the production process, strengthen quality control and conduct strict quality inspections on bearing components manufactured using recycled materials. Through means such as non – destructive testing and performance testing, ensure that product quality meets the requirements. For example, conduct hardness testing and flaw detection on bearing rings, and conduct dimensional accuracy testing and fatigue life testing on rolling elements to promptly identify and address quality issues.

Optimizing Recycling Processes and Reducing Costs

Increase investment in the research and development of recycling processes and develop efficient and energy – saving recycling technologies. For example, the use of advanced smelting technologies such as electric arc furnace smelting can improve the smelting efficiency of waste metals and reduce energy consumption. Develop new plastic recycling and processing technologies, such as a combination of physical and chemical modification methods, to improve the performance of recycled plastics and reduce the impact of performance degradation on bearing manufacturing.

Enterprises can cooperate with recycling enterprises to establish stable recycling channels and reduce the procurement cost of recycled materials. Optimize the production process, improve production efficiency, and reduce cost waste in the processing of recycled materials and bearing manufacturing. Through large – scale production, reduce the production cost per unit product and improve economic benefits.

Promoting Technological Innovation and Cooperation

Bearing manufacturing enterprises should strengthen cooperation with scientific research institutions and universities to jointly carry out research on the technologies of using recyclable materials in bearing manufacturing. Develop new material processing technologies and manufacturing processes to solve key problems such as the performance consistency of recycled materials and separation technology difficulties. For example, use nanotechnology to perform surface treatment on recycled materials to improve their wear resistance and corrosion resistance; develop new composite material recycling and separation technologies to improve recycling efficiency and quality.

Enterprises within the industry should also strengthen communication and cooperation, share experiences and technical achievements in the application of recyclable materials, and jointly promote the development of the industry. By establishing industry standards and specifications, standardize the quality standards and manufacturing processes of recycled materials to promote the wide application of recyclable materials in bearing manufacturing.

The Price of Slewing Bearings

The price of slewing bearings is affected by multiple factors. Materials are crucial. Slewing bearings made of high – grade steel and special alloys have better strength and wear resistance, higher costs, and thus higher prices. For example, slewing bearings containing special alloys are more expensive than those made of ordinary materials. Processing accuracy is also important. High – precision processing requires advanced equipment and complex techniques, which increases costs and naturally makes the product price higher. Slewing bearings used in precision equipment generally have a relatively high price. The manufacturing process also affects the price. Advanced manufacturing processes can enhance performance but also increase costs and thus raise the selling price. In addition, market supply and demand have a significant impact on prices. When demand is high, prices rise; when demand is low, prices fall.

Supplier of Slewing Bearings

LDB Bearing Company is truly a legend in the bearing industry! Since its establishment in 1999, it has made continuous progress and grown from obscurity to become a leading enterprise in the industry. The company is located in Luoyang, Henan Province, where the bearing industry is well – developed, enjoying the advantages of industrial resources. Its products embody technology and craftsmanship and are widely used in fields such as industrial robots and laser cutting machines. For example, its spur – gear slewing drive has extremely high precision and strong stability, greatly improving the operation accuracy and efficiency of industrial welding robots. Moreover, the company attaches great importance to product quality and strictly controls it. With its excellent quality and attentive service, its products sell well. It is believed that in the future, LDB Bearing Company will continue to shine brightly and contribute more to the development of the bearing industry!

Approaches to Handling Old Slewing Bearings

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The disposal of old slewing supports is related to resource recovery, environmental protection and economic benefits. Old slewing supports are components replaced from equipment for various reasons. They have various problems and can be treated differently according to the degree of wear.

What are Old Slewing Bearings?

An old slewing bearing refers to a slewing bearing component that has been used on mechanical equipment and is replaced due to reasons such as long – term operation, wear and tear, aging, or equipment upgrading. A slewing bearing itself is a mechanical component that can withstand comprehensive loads and enable relative slewing motion. It is commonly found in equipment such as cranes, excavators, and port machinery. Old slewing bearings may have problems such as worn raceways, damaged rolling elements, and aged seals, which lead to a decline in accuracy and performance, making them unable to meet the normal operation requirements of the equipment. However, after evaluation, some old slewing bearings can be reused through repair and renovation, while those with severe wear are subject to material recycling to achieve resource circulation.

Slightly Worn Slewing Bearings

There are various ways to recycle and reuse old slewing bearings. For slewing bearings with slight wear and an intact structure, they can be rejuvenated through repair and renovation. First, the slewing bearing is completely disassembled and cleaned, and each component is carefully inspected for wear and deformation. For the worn raceways and rolling elements, professional grinding and quenching processes are used for repair to restore their dimensional accuracy and surface hardness. After renovation, the slewing bearings are subject to strict quality inspection. Once all performance indicators meet the standards, they can be reused in equipment with relatively lower accuracy requirements, such as small – scale construction machinery and material handling equipment. This can not only significantly reduce the equipment procurement cost but also reduce the energy consumption and environmental pollution during the production of new slewing bearings.

Severely Worn Slewing Bearings

For old slewing bearings with severe wear that cannot be repaired, material recycling is the main treatment approach. Slewing bearings are mostly made of steel. They can be disassembled and recycled separately. Through professional mechanical disassembly equipment, components such as the inner and outer rings, rolling elements, and cages of the slewing bearing are separated, and the oil stains and impurities on the surface are removed. The sorted steel can be remelted in a furnace to make new steel products, which are used to manufacture various mechanical parts, building materials, etc. In addition to steel, some slewing bearings may contain non – ferrous metals such as copper and zinc. Specific separation technologies can be used to separate these non – ferrous metals, which can also achieve recycling and improve the comprehensive utilization rate of resources.

Other Methods for Handling Slewing Bearings

When handling old slewing bearings, the remanufacturing of their components can also be considered. Components on old slewing bearings that still have usability, such as some unworn rolling elements and seals, can be cleaned, inspected, and re – processed, and then reassembled into new slewing bearings or used for the repair of other equipment. This approach can not only make full use of the remaining value of old slewing bearings but also reduce the production of new components, thereby reducing production costs and resource consumption.

Problems in Handling Old Slewing Bearings

When handling old slewing bearings, environmental protection issues cannot be ignored. Pollutants such as oil stains and lubricating oil generated during the disassembly process need to be properly treated. Special oil – stain treatment equipment is used to collect the oil stains, and the oil and water are separated through oil – water separation technology. The separated oil can be recycled, and the wastewater needs to be treated to meet the environmental protection discharge standards before it can be discharged. In addition, measures should be taken to control the noise and dust generated during the disassembly and recycling process, such as setting up sound – insulation facilities in the operation area and installing dust collection devices, to reduce the impact on the surrounding environment and personnel.

To effectively handle old slewing bearings, industry collaboration and standard – setting are of great significance. Manufacturers, users, and recycling and treatment enterprises of slewing bearings should strengthen cooperation and establish a complete recycling system. Manufacturers can provide technical support and guidance for the recycling of old slewing bearings. Users should promptly deliver waste slewing bearings to recycling and treatment enterprises, and recycling and treatment enterprises should use professional technologies and equipment for efficient processing. At the same time, relevant departments should formulate unified recycling and treatment standards and specifications for old slewing bearings, clarify the treatment process, quality requirements, and environmental protection standards, and strengthen the supervision of recycling and treatment enterprises to ensure that the treatment process of old slewing bearings complies with the regulations and achieves the dual goals of resource recycling and environmental protection.

Handling old slewing bearings is a complex and important task that covers multiple aspects such as recycling and reuse, environmental protection measures, and industry collaboration. Through scientific and reasonable handling methods, the maximum utilization of resources can be achieved, environmental pollution can be reduced, and strong support can be provided for the sustainable development of the industry. With the continuous progress of technology and the improvement of people’s environmental awareness, it is believed that the handling of old slewing bearings will be more efficient and environmentally friendly in the future, contributing more to the construction of a resource – saving and environment – friendly society.

The Price of Slewing Bearings

The price of slewing bearings is affected by multiple factors. Materials are crucial. Slewing bearings made of high – grade steel and special alloys have better strength and wear resistance and are more expensive. Processing accuracy is also important. High – precision processing requires high – end equipment and advanced technology, increasing costs and thus raising the product price. Market supply and demand also affect prices. When the demand from industries such as construction and wind power is high, resulting in a shortage of supply, the price rises. When the demand is weak and the supply is excessive, the price drops. In addition, brand value and the quality of after – sales service can also influence the price of slewing bearings to a certain extent.

Supplier of Slewing Bearings

LDB Bearing Company is truly remarkable! Over the past two decades, it has risen from obscurity to become a leading enterprise in the industry. It has always adhered to meticulous manufacturing, and its products are of excellent quality. For example, its high – precision slewing bearings are widely used in many fields. It also continues to innovate. The self – developed spur – gear slewing drive has helped to upgrade industrial welding robots. Moreover, it adheres to the concept of “serving the world” and provides considerate after – sales service. Thanks to these efforts, it has won the hearts of global customers. In the future, it is certain to continue to shine in the bearing industry and contribute to the development of the world’s industry!

Why Lubricating Oil Is Important for Slewing Bearings

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In the vast system of industrial machinery, lubricating oil and bearings, although seemingly minor components, play a crucial role. They are the core elements ensuring the stable and efficient operation of machinery.

What is a Slewing Bearing?

Slew Bearing, as the hubs of mechanical operation, are responsible for supporting and guiding rotating or oscillating components. There is a wide variety of slew bearings. From common deep – groove ball slew bearings to tapered roller slew bearings suitable for heavy loads, different types meet the specific requirements of various machines. For example, in an automotive engine, the crankshaft slew bearing has to withstand huge pressure and high – speed rotation. Its precision and reliability directly affect the engine’s performance. In precision instruments, miniature slew bearings need to ensure minimal friction and high – precision operation.

What is Lubricating Oil?

Lubricating oil is like the “blood” of machinery and is crucial for the normal operation of slew bearings. Its primary function is to reduce friction. When a slew bearing is in operation, the lubricating oil forms an oil film between the rolling elements and the raceway. This transforms the direct metal – to – metal friction into the internal friction of the oil film, greatly reducing friction, minimizing wear, and extending the slew bearing’s service life. Take the motor slew bearing as an example. Good lubrication can reduce energy consumption and improve the motor’s efficiency.

Functions of Lubricating Oil

Lubricating oil also has a heat – dissipation function. During the operation of a slew bearing, heat is generated due to friction. If the heat cannot be dissipated in time, a continuous increase in temperature will affect the slew bearing’s precision and material properties, and may even cause the slew bearing to seize. The lubricating oil can absorb heat during the circulation process and transfer it to the surrounding environment, maintaining the normal operating temperature of the slew bearing. For example, the gearbox slew bearings of large – scale wind turbines generate a large amount of heat under high – load operation, and a dedicated lubricating oil cooling system is essential.

In addition, lubricating oil can also act as a seal and anti – rust agent. It can fill the gaps in the slew bearing, preventing the intrusion of external dust, moisture, and other impurities and protecting the internal structure of the slew bearing. At the same time, the anti – rust additives in the lubricating oil can form a protective film on the metal surface, preventing the slew bearing from rusting and corroding, ensuring its stable operation in harsh environments, such as the slew bearings of mechanical equipment by the sea.

To achieve the best combination of lubricating oil and slew bearings, it is necessary to select the appropriate lubricating oil according to the type of slew bearing and working conditions. High – speed slew bearings are suitable for low – viscosity lubricating oil, which can reduce the stirring resistance. Heavy – load and low – speed slew bearings require high – viscosity lubricating oil with excellent extreme – pressure resistance to ensure the strength of the oil film. For example, low – viscosity precision machine tool oil is selected for the high – speed spindle slew bearings of machine tools, while high – viscosity lubricating oil with special anti – wear additives is used for the large heavy – load slew bearings of mining machinery.

At the same time, the correct lubrication method is also of great importance. Common lubrication methods include oil bath lubrication, splash lubrication, oil injection lubrication, and grease lubrication. Oil bath lubrication is suitable for medium – and low – speed slew bearings, where the slew bearing is partially immersed in oil for lubrication. Splash lubrication relies on rotating components to splash oil onto the slew bearing. Oil injection lubrication is used for high – speed, heavy – load, and important slew bearings, and oil is supplied precisely through an oil injection nozzle. Grease lubrication is often used for small, low – speed, and hard – to – lubricate slew bearings, using lubricating grease for lubrication.

In practical use, it is also necessary to regularly check the condition of the lubricating oil and the operation of the slew bearing. The lubricating oil will gradually age and become contaminated during use, and its performance will decline. Therefore, it needs to be replaced regularly. By checking the wear and clearance changes of the slew bearing, problems can be detected in a timely manner, and maintenance or replacement can be carried out to effectively avoid equipment failures and ensure the continuity of production.

Lubricating oil and slew bearings are interdependent and jointly safeguard the stable operation of machinery. In today’s continuously developing industry, in – depth research and rational application of lubricating oil and slew bearing technologies are of great significance for improving mechanical performance, reducing energy consumption, and extending the service life of equipment. They are a key link in promoting the efficient development of the industry.

The Price of Slewing Slew bearings

The price of slewing slew bearings is affected by many factors. Material is a key factor. Slewing slew bearings made of high – quality steel and special alloys have better strength and wear resistance and are more expensive. For example, those made of high – grade alloy steel are more expensive than those made of ordinary steel. Processing precision is also very important. High – precision processing requires advanced equipment and sophisticated technology, which can ensure slewing accuracy and reduce vibration. Accordingly, the cost and selling price are also high. When the demand from industries such as construction and wind power is high and the supply is insufficient, the price rises. If the demand is weak and the supply is excessive, the price will fall.

Supplier of Slewing Slew bearings

LDB bearing is an outstanding model in the slew bearing industry! Over the past twenty – odd years, it has adhered to quality, growing from an inexperienced enterprise to a mainstay in the industry. Its products combine technology and craftsmanship. High – precision slewing slew bearings, slewing drive devices, etc. are widely used in many fields and perform remarkably in areas such as industrial welding robots. It always adheres to the vision of “meticulous manufacturing, serving the world”, constantly innovates and breaks through, and has leading technical strength. With reliable product quality and excellent services, it has won the trust of global customers. In the future, it will surely continue to lead the industry trend and contribute more to the development of the world’s industry!

The Importance of Sealing in Slewing Bearings

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The sealing technology of slewing supports is of great significance to the operation and lifespan of equipment. It ensures the normal operation of components by preventing the intrusion of pollutants and the leakage of lubricating oil.

What is the Sealing of a Slewing Bearing?

Slewing bearings are widely used in mechanical equipment such as cranes, excavators, and wind turbines. During operation, they need to withstand complex loads and harsh working environments. As an important part of slewing bearings, sealing technology mainly serves to prevent external pollutants such as dust, moisture, and impurities from entering the interior of the slewing bearing and to prevent the leakage of internal lubricating oil, thereby ensuring the normal operation of various components of the slewing bearing and extending the service life of the equipment.

The Principle of Slewing Bearing Sealing Technology

The sealing principle of slewing bearings is mainly based on preventing or reducing the leakage and intrusion of substances. Sealing devices usually form an effective sealing barrier at key parts such as between the inner and outer rings of the slewing bearing and between the rolling elements and the raceways to achieve the sealing function.

Take contact – type seals as an example. The seal contacts the slewing components tightly, and the elastic deformation of the seal is used to fill the gaps, preventing external pollutants from entering and internal lubricating oil from leaking. Non – contact – type seals, on the other hand, achieve sealing by setting up special structures, such as labyrinth – type structures. By utilizing air resistance and multiple barriers, it is difficult for pollutants to enter the interior of the slewing bearing, and at the same time, the leakage of lubricating oil is reduced.

Types of Slewing Bearing Seals

Contact – Type Seals

Lip – Seal: The lip – seal is one of the most common types of contact – type seals, usually made of elastic materials such as rubber. It has one or more lips that fit tightly against the surface of the slewing component to form a seal. The advantages of the lip – seal are its simple structure and good sealing performance, which can effectively prevent pollutants such as dust and moisture from entering the interior of the slewing bearing. However, during high – speed rotation, the friction between the lip and the slewing component is relatively large, which can easily cause wear of the seal and reduce the sealing life.

– O – Ring Seal: The O – ring seal is a circular rubber seal installed in a sealing groove. It achieves sealing through its own elastic deformation. The O – ring seal has good sealing performance, can withstand a certain pressure, and is easy to install with a low cost. However, in high – temperature, high – pressure, or chemically corrosive environments, the performance of the O – ring may be affected, leading to seal failure.

Non – Contact – Type Seals

– Labyrinth Seal: The labyrinth seal creates a labyrinth – like passage by setting up a series of interlaced grooves and protrusions between the inner and outer rings of the slewing bearing. When pollutants attempt to enter the interior of the slewing bearing, they need to pass through a tortuous path. During this process, the pollutants are blocked by air resistance, and most of them are blocked outside the labyrinth, thus achieving sealing. The advantages of the labyrinth seal are no contact friction, suitability for high – speed rotation, and a long service life. However, its sealing effect is relatively weak, and its ability to block fine particles is limited.

– Centrifugal Seal: The centrifugal seal uses the centrifugal force generated by the high – speed rotation of the slewing component to throw away the pollutants near the sealing part, thereby achieving the purpose of sealing. This sealing method is usually used in combination with other sealing methods to improve the overall sealing performance. The centrifugal seal has a good sealing effect when the rotation speed is high and the pollutant particles are large, but it has a poor sealing effect for low – speed rotation or fine particles.

The Impact of Sealing Technology on Equipment Performance

Impact on the Service Life of the Slewing Bearing

Good sealing technology can effectively prevent external pollutants from entering the interior of the slewing bearing, reducing the wear and corrosion of components such as rolling elements and raceways, thus extending the service life of the slewing bearing. Conversely, if the seal fails and pollutants such as dust and moisture enter the interior of the slewing bearing, it will intensify the wear of the components and cause the slewing bearing to be damaged prematurely.

Impact on the Operating Stability of the Equipment

The quality of the sealing technology directly affects the operating stability of the equipment. When poor sealing leads to the leakage of lubricating oil, the lubrication effect between the components of the slewing bearing will deteriorate, resulting in additional friction and vibration, which affects the normal operation of the equipment. In addition, the entry of pollutants into the interior of the slewing bearing may also cause changes in the gaps between the components, further affecting the operating accuracy and stability of the equipment.

Impact on the Equipment Maintenance Cost

Effective sealing technology can reduce the frequency and cost of equipment maintenance. For slewing bearings with good sealing, the internal components are less polluted, and there is no need for frequent maintenance work such as cleaning and replacement of components. However, for slewing bearings with seal failure, not only frequent maintenance is required, but it may also be necessary to replace the entire slewing bearing due to component damage, thus increasing the equipment maintenance cost.

The sealing technology of slewing bearings is a key factor in ensuring the normal operation of equipment and extending its service life. Different types of sealing technologies have their own advantages and disadvantages. In practical applications, it is necessary to comprehensively select the appropriate sealing method according to factors such as the working environment, rotation speed, and load of the slewing bearing. At the same time, with the continuous development of science and technology, new sealing materials and sealing structures are constantly emerging. Relevant technicians should pay close attention to the development trends of sealing technology and continuously optimize the sealing design to improve the sealing performance of slewing bearings and further enhance the overall performance and reliability of the equipment.

The Price of Slewing Bearings

There are many factors that affect the price of slewing bearings. Firstly, the type and structure, such as different structures like single – row, double – row, or triple – row roller types, have price differences due to different design and manufacturing complexities. Secondly, the accuracy grade is crucial. High – precision slewing bearings are more difficult to process and thus more expensive. Moreover, the choice of materials has a significant impact. Slewing bearings made of high – quality alloy steel or special materials have high costs and correspondingly higher prices. Finally, market supply – and – demand relationships can cause price fluctuations. When supply is in short supply, prices rise, and when there is an oversupply, prices may fall.

Supplier of Slewing Bearings

LDB bearing compan!Since its establishment, it has been shining all the way. Empowered by multiple sets of advanced equipment, it can handle the processing of various bearings with ease. With many professional talents delving into research, it has created a legend of quality. Products such as the S – series slewing drives have excellent performance, with precise transmission and strong load – bearing capacity, and have shown their prowess in fields such as industrial robots. With strict quality control, it has passed authoritative certifications. It has partnered with many well – known enterprises. LDB bearing leads the bearing industry with its strength and will surely create more brilliance in the future!

Preventive Measures for the Failure of Slewing Bearing

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Slewing bearings are widely used in various types of equipment.Once a failure occurs, it will not only lead to equipment downtime and increased maintenance costs but may also cause safety accidents. Therefore, it is of great significance to analyze the failure modes of slewing bearings.

What is the Failure of a Slewing Bearing?

Slewing bearings play a crucial role in the slewing function of various mechanical devices. Their failure can seriously affect the operation of the equipment. This article deeply analyzes the common failure modes of slewing bearings, including wear, fatigue fracture, corrosion, and seal failure, and proposes corresponding preventive measures and suggestions for each failure mode, providing a reference for ensuring the reliable operation of slewing bearings.

Common Failure Modes of Slewing Bearings

Abrasive Wear:Impurities such as dust and sand in the working environment enter the interior of the slewing bearing and form abrasive particles between the rolling elements and the raceways. As the slewing motion occurs, these abrasive particles continuously scrape the surface, causing the surface material to gradually peel off and resulting in wear. In the slewing bearings of mining machinery, abrasive wear is relatively common due to the dusty working environment.

Adhesive Wear:Under heavy – load, high – speed, or poor – lubrication conditions, the oil film on the surfaces of the rolling elements and the raceways is damaged, and the metals come into direct contact. Local high temperatures and pressures are generated, causing the surface materials to adhere to each other. Subsequently, the adhered points are torn apart during relative motion, resulting in adhesive wear.

Under long – term alternating loads, fatigue cracks will occur on the surface or inside of the slewing bearing. These cracks continue to expand and eventually lead to component fracture. Fatigue fractures usually occur in stress – concentration areas, such as the edges of the raceways and around the bolt holes. For example, during the frequent lifting of heavy objects by a crane, the load on the slewing bearing changes frequently, making it prone to fatigue fracture.

Chemical Corrosion:When slewing bearings are exposed to environments containing corrosive media, such as humid air, seawater, and chemical solutions, the surface metal will react chemically with the corrosive media, resulting in corrosion. In marine engineering equipment, slewing bearings are easily corroded by seawater.

Electrochemical Corrosion:When there is a potential difference between different metal components of a slewing bearing and they are in an electrolyte solution, an electrochemical corrosion cell is formed, accelerating the corrosion of the metal. For example, if the bolts of a slewing bearing are made of a different material from the base material, electrochemical corrosion is likely to occur in a humid environment.

The aging, damage, or improper installation of the seals can lead to seal failure of the slewing bearing. After the seal fails, external impurities such as dust and moisture can easily enter the interior, exacerbating wear and corrosion. At the same time, the internal lubricating oil will leak, affecting the lubrication effect and further leading to the failure of the slewing bearing.

Preventive Measures and Suggestions for Failure

Strengthen Sealing Protection:Use high – quality sealing devices and regularly inspect and replace the seals to prevent dust and impurities from entering the interior of the slewing bearing. For example, combine labyrinth seals and lip – type seals to improve the sealing effect.

Optimize the Lubrication System:Select the appropriate lubricating oil and lubrication method, and regularly add and replace the lubricating oil to ensure a good oil film is formed between the rolling elements and the raceways. Depending on the working conditions, a forced lubrication or automatic lubrication system can be used.

Improve Component Machining Accuracy：Strictly control the machining accuracy of the rolling elements and raceways, reduce the surface roughness, and reduce the occurrence of abrasive wear and adhesive wear.

Rationalize the Structure Design：Optimize the structural design of the slewing bearing to reduce stress – concentration areas. For example, use rounded corners at the edges of the raceways to avoid sharp corners, and rationally design the position and size of the bolt holes to reduce the stress – concentration factor.

Control the Working Load：Arrange work tasks reasonably according to the rated load of the equipment to avoid overloading. In equipment such as cranes, install overload protection devices to prevent the slewing bearing from bearing excessive alternating loads due to overloading.

Conduct Regular Inspections and Maintenance：Regularly perform non – destructive testing on slewing bearings, such as ultrasonic testing and magnetic particle testing, to detect fatigue cracks in a timely manner and repair or replace them.

Apply Surface Protection Treatments：Carry out anti – corrosion treatments on the surface of the slewing bearing, such as spraying anti – corrosion paint, electroplating, and hot – dip galvanizing, to form a protective film and isolate the corrosive media. In a marine environment, coatings resistant to seawater corrosion can be used for surface spraying.

Select Corrosion – Resistant Materials：Select appropriate corrosion – resistant materials to manufacture the key components of the slewing bearing according to the working environment. For example, in chemical equipment, stainless – steel materials can be used to manufacture slewing bearings.

Control Environmental Factors：Try to improve the working environment of the slewing bearing and reduce contact with corrosive media. For example, in a humid environment, take moisture – proof measures and install dehumidifying equipment.

Select High – Quality Seals：Select reliable, age – resistant, and wear – resistant seals according to the working conditions of the slewing bearing. In high – temperature environments, choose high – temperature – resistant rubber seals; in high – pressure environments, choose seals with good sealing performance.

Install Seals Correctly：Install the seals strictly in accordance with the installation instructions to ensure the correct installation position and that the seals are free from distortion and deformation. During the installation process, pay attention to protecting the surface of the seals to avoid scratches.

Regularly Inspect and Replace Seals：Regularly inspect the condition of the seals. If aging, damage, or leakage is found, replace them in a timely manner.

The failure of slewing bearings can seriously affect the normal operation of equipment. By analyzing common failure modes and taking corresponding preventive measures, such as strengthening sealing protection, optimizing the lubrication system, rationally designing the structure, controlling the working load, and applying surface protection treatments, the failure risk of slewing bearings can be effectively reduced, their service life can be extended, and the reliability and safety of the equipment can be improved. In practical applications, a variety of preventive measures should be comprehensively applied according to the specific working conditions of the slewing bearing to ensure its stable operation.

The Price of Slewing Bearings

Larger – sized slewing bearings with strong load – bearing capacity are relatively more expensive because they require more raw materials and more complex processing techniques. For example, the slewing bearings used in large – scale cranes can have a diameter of several meters and are much more expensive than those used in small – scale equipment..Slewing bearings made of high – quality materials have better wear resistance, corrosion resistance, and strength, ensuring long – term stable operation under harsh working conditions. Their prices also increase due to the higher material costs. For example, slewing bearings made of high – strength alloy steel or stainless – steel materials are more expensive than those made of ordinary carbon – steel materials.

Supplier of Slewing Bearings

Since its establishment in Luoyang, Henan Province, a bearing production base in China, in 1999, LDB bearing company has been deeply engaged in the bearing manufacturing field and achieved remarkable results. In terms of products, LDB bearing company has been highly productive. From the strict screening of raw materials entering the factory, to every process in the production process, and finally to the product leaving the factory, strict process control and quality control are implemented to ensure that each product leaving the factory meets high – quality standards. With its professional strength, excellent products, strict quality control, and wide market, LDB bearing company has become a leader in the bearing manufacturing industry. It is expected to continue to explore and innovate in the future and contribute more to the global industrial development.