Flanged Slewing Bearings: When and Why to Use Them in Compact Rotating Applications
What Is a Flanged Slewing Bearing?
A flanged slewing bearing is a specialized type of slewing ring that integrates a flange—usually on either the inner or outer ring—into its design. The flange serves as a built-in mounting surface, allowing for simplified installation without additional mounting plates or housing structures. These bearings retain the core function of supporting axial, radial, and moment loads while offering improved alignment and space-saving benefits.
Flanged slewing bearings are especially popular in applications requiring compact structures, lightweight systems, and easy mounting. From robotics to aerial platforms, these precision components offer mechanical versatility and operational convenience.
Structural Advantages of Flanged Slewing Bearings
Flanged slewing bearings can be manufactured in multiple configurations:
Flange on Outer Ring: Easier to mount to static structures
Flange on Inner Ring: Preferred for rotating components
Dual-Flanged Design: Offers higher rigidity and symmetrical support
These bearings can be:
Gearless
Internally geared
Externally geared
Why Choose a Flanged Slewing Bearing?
Flanged slewing bearings are ideal when you need:
Compact Design
The integrated flange reduces the need for additional mounting components, saving space and weight.
Simplified Installation
No welding or complex housing required—just bolt-on mounting to existing structures.
High Positional Accuracy
Improved alignment and rigidity make them suitable for indexing or positioning tables.
Cost-Efficiency
Less fabrication required for housings or base structures translates into reduced system costs.
LDB Flanged Slewing Bearing Solutions
As a global manufacturer and supplier, LDB offers a wide range of high-quality flanged slewing bearings under its LDB-FL Series, designed to fit various industrial, automation, and energy applications.
Key Features of LDB-FL Series:
Outer Diameter Range: 200mm – 1600mm
Gear Types: External, Internal, or None
Bolt Hole Pattern: Customizable
Flange Position: Inner or Outer Ring
Materials: 50Mn or 42CrMo with raceway hardening
Sealing: Labyrinth or contact seals available
Customization Support:
CAD drawings with bolt alignment
Surface treatment options (phosphate, zinc, chrome)
Special lubricant or food-grade grease
Common Applications
| Application Type | Why Flanged Bearings Fit |
| Industrial Robotics | Precise alignment in base joints |
| Medical Equipment | Compact and lightweight movement |
| Solar Trackers | Streamlined structural connection |
| Aerial Work Platforms | Light weight, easy serviceability |
| Stage & Lighting Systems | Simple rotation mechanism |
| Food & Beverage Machines | Sanitary, sealed construction |
Installation Tips
Ensure bolt torque follows manufacturer specs to avoid deformation
Clean flange surface before assembly for best alignment
Use alignment pins in high-precision applications
Recheck gear mesh and preload after initial installation
Flanged Bearing vs Standard Slewing Bearing
| Feature | Flanged Bearing | Standard Slewing Bearing |
| Installation | Bolt-on, direct mounting | Requires external mounting ring or plate |
| Weight | Lighter overall | Heavier, depending on housing |
| Assembly Time | Faster | Requires more setup |
| Common Applications | Compact/lightweight design | Heavy machinery, cranes |
Typical Price Range and Specifications
The price of flanged slewing bearings depends on size, flange location, and load rating. LDB offers competitive factory-direct pricing with customization support.
| Size (Outer Diameter) | Price Range (USD) | Gear Option |
| 200–600 mm | $180 – $600 | Gearless or internal |
| 600–1000 mm | $600 – $1200 | External gear |
| 1000–1600 mm | $1200 – $2500+ | Custom gear profile |
Supplier Note: LDB supports OEM orders, bulk purchasing discounts, and just-in-time shipping for industrial assembly lines.
Why Choose LDB as Your Manufacturer and Supplier?
Precision Manufacturing: Advanced CNC machining ensures concentricity and raceway accuracy
Material Quality: All raceways hardened to HRC 55–62
Flexible Engineering: Tailored flange size, gear ratio, and hole placement
Global Delivery: Fast shipping from China to Europe, North America, and Southeast Asia
Support Services: Drawing consultation, installation guidance, technical training
As both manufacturer and supplier, LDB delivers high-value flanged slewing bearings with reliability and responsiveness.
Conclusion
If your project requires compactness, fast installation, and precision rotation, flanged slewing bearings are the right fit. With LDB’s engineering support and high-performance product line, integrating these bearings into your machine architecture becomes simple and efficient.
Ready to get started? Contact LDB today to explore our flanged bearing catalog or request a customized quote.
