LDB https://www.ldb-bearing.com Fri, 23 Oct 2026 07:47:42 +0000 en-US hourly 1 https://wordpress.org/?v=6.4.13 Four-Point Contact Ball Slewing Bearings: Design Principles and Selection Guide https://www.ldb-bearing.com/ldb-bearing-knowledge/four-point-contact-ball-slewing-bearings-design-principles-and-selection-guide.html Wed, 28 Oct 2026 01:08:00 +0000 https://www.ldb-bearing.com/?p=7547 The single-row four-point contact ball slewing bearing is a highly versatile rotational component engineered to simultaneously handle axial, radial, and overturning moment loads within a compact footprint, making it widely trusted in construction machinery, cranes, and solar tracking systems. As one of the core product lines of Luoyang Longda Bearing Co., Ltd. (LDB Bearing), these […]

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]]> Three-Row Roller Slewing Bearings in Heavy Machinery: Advantages and Load Calculation https://www.ldb-bearing.com/ldb-bearing-knowledge/three-row-roller-slewing-bearings-in-heavy-machinery-advantages-and-load-calculation.html Mon, 26 Oct 2026 06:48:00 +0000 https://www.ldb-bearing.com/?p=7544 The extreme demands placed on heavy-duty industrial equipment require reliable rotational components capable of withstanding massive loads without sacrificing operational precision. Among various configurations, the three-row cylindrical roller design stands out as the ultimate engineering solution for ultra-heavy machinery. As a specialized manufacturer with decades of expertise in large-scale rotational components, Luoyang Longda Bearing Co., […]

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]]> Low-Temperature Slewing Bearing Selection: Material Toughness and Seal Performance in Arctic Conditions https://www.ldb-bearing.com/ldb-bearing-knowledge/low-temperature-slewing-bearing-selection-material-toughness-and-seal-performance-in-arctic-conditions.html Fri, 23 Oct 2026 01:54:00 +0000 https://www.ldb-bearing.com/?p=7538 When heavy machinery—such as mining excavators, port cranes, and wind turbines—operates in sub-zero environments like arctic regions or high-altitude plateaus, standard mechanical components face severe performance degradation. Among all critical components, the slewing bearing bears the brunt of combined axial, radial, and overturning moment loads under extreme thermal stress. Choosing a slewing bearing for sub-zero […]

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]]> How to Check Slewing Bearing Wear: Measuring Axial and Radial Clearance in Service https://www.ldb-bearing.com/ldb-bearing-knowledge/how-to-check-slewing-bearing-wear-measuring-axial-and-radial-clearance-in-service.html Wed, 21 Oct 2026 00:44:00 +0000 https://www.ldb-bearing.com/?p=7533 A slewing bearing rarely fails without warning. Long before it seizes or breaks, it usually develops extra movement between its rings. Measuring that movement is one of the simplest and most useful checks a maintenance team can make. This guide explains what clearance is, which warning signs should prompt a measurement, how to take readings […]

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]]> How to Identify and Measure a Slewing Bearing for Replacement When You Have No Drawing or Nameplate https://www.ldb-bearing.com/ldb-bearing-knowledge/how-to-identify-and-measure-a-slewing-bearing-for-replacement-when-you-have-no-drawing-or-nameplate.html Mon, 19 Oct 2026 06:38:00 +0000 https://www.ldb-bearing.com/?p=7530 When a machine stops because its slewing bearing has failed, the first obstacle is often not the repair itself but the missing paperwork. The nameplate has worn away, the original drawing was never handed over, or the machine maker no longer supports the model. The good news is that a slewing bearing can be fully […]

The post How to Identify and Measure a Slewing Bearing for Replacement When You Have No Drawing or Nameplate first appeared on LDB.

]]> Foundation Flatness and Structural Stiffness: Preventing Premature Binding in Large-Diameter Slewing Bearings https://www.ldb-bearing.com/ldb-bearing-knowledge/foundation-flatness-and-structural-stiffness-preventing-premature-binding-in-large-diameter-slewing-bearings.html Fri, 16 Oct 2026 00:55:00 +0000 https://www.ldb-bearing.com/?p=7525 Large-diameter slewing bearings are precision-engineered mechanical assemblies designed to transmit heavy axial, radial, and tilting moment loads. However, unlike small deep-groove ball bearings that possess rigid inner and outer rings, slewing rings are inherently flexible thin-section structures. Their operational performance depends heavily on the geometry and rigidity of the supporting mounting foundation. In field applications, […]

The post Foundation Flatness and Structural Stiffness: Preventing Premature Binding in Large-Diameter Slewing Bearings first appeared on LDB.

]]> Internal vs. External Geared Slewing Bearings: Gear Tooth Failure Modes and Induction Hardening Best Practices https://www.ldb-bearing.com/ldb-bearing-knowledge/internal-vs-external-geared-slewing-bearings-gear-tooth-failure-modes-and-induction-hardening-best-practices.html Wed, 14 Oct 2026 00:19:00 +0000 https://www.ldb-bearing.com/?p=7522 Slewing bearings with integrated gear teeth—whether internal or external—are fundamental driving components in modern heavy machinery. By combining load-bearing rotation with high-torque gear transmission in a single compact assembly, geared slewing rings power everything from hydraulic excavators and mobile cranes to wind turbines and slew drives. However, transmitting high torque under heavy, alternating shock loads […]

The post Internal vs. External Geared Slewing Bearings: Gear Tooth Failure Modes and Induction Hardening Best Practices first appeared on LDB.

]]> Lubrication Management for Slewing Bearings: How Extreme Operating Temperatures Dictate Grease Selection https://www.ldb-bearing.com/ldb-bearing-knowledge/lubrication-management-for-slewing-bearings-how-extreme-operating-temperatures-dictate-grease-selection.html Mon, 12 Oct 2026 07:59:54 +0000 https://www.ldb-bearing.com/?p=7516 Slewing bearings are the critical backbone of heavy machinery, supporting massive axial, radial, and tilting moment loads while enabling smooth 360-degree rotation. From towering construction cranes and port machinery to automated solar trackers and cold-climate forestry equipment, these large-diameter bearings operate under diverse environmental conditions. Among all environmental factors, operating temperature is one of the […]

The post Lubrication Management for Slewing Bearings: How Extreme Operating Temperatures Dictate Grease Selection first appeared on LDB.

]]> Slewing Bearings for Dusty and Abrasive Environments: Mining, Quarrying, and Cement Plants https://www.ldb-bearing.com/ldb-bearing-knowledge/slewing-bearings-for-dusty-and-abrasive-environments-mining-quarrying-and-cement-plants.html Fri, 09 Oct 2026 00:59:00 +0000 https://www.ldb-bearing.com/?p=7513 What Is a Slewing Bearing? A slewing bearing is a large rotating component that supports heavy loads while enabling rotation between two structures. It handles axial loads, radial loads, and tilting moments simultaneously. These bearings are essential in cranes, excavators, wind turbines, and other heavy machinery. In mining, quarrying, and cement plants, slewing bearings operate […]

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]]> Grease Selection for Slewing Bearings: A Practical Guide to Base Oil, Thickener, and Additives https://www.ldb-bearing.com/ldb-bearing-knowledge/grease-selection-for-slewing-bearings-a-practical-guide-to-base-oil-thickener-and-additives.html Fri, 09 Oct 2026 00:47:00 +0000 https://www.ldb-bearing.com/?p=7509 What Is a Slewing Bearing? A slewing bearing is a large rotating component that supports heavy loads while enabling rotation between two structures. It handles axial loads, radial loads, and tilting moments simultaneously. These bearings are essential in cranes, excavators, wind turbines, solar trackers, and other heavy machinery. They operate at very low rotational speeds, […]

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