Axial-Radial Bearings

Description

1. Structure of Axial-Radial Bearings
1. Axial Raceways
• Axial raceways are machined on the end faces of the inner and outer rings to bear axial loads.
• When combined with balls or rollers, they function as axial roller bearings.
2. Radial Raceways
• The grooves on the inner and outer diameters are designed as radial raceways.
• When combined with rollers, they function as radial roller bearings.
3. Rolling Elements
• Axial section: Usually uses balls or short cylindrical rollers evenly distributed along the axial raceways to withstand bi-directional axial loads.
• Radial section: Typically uses cylindrical rollers to bear radial loads and provide high rigidity.
4. Cages or Spacers
• Maintain even spacing between rolling elements and prevent friction between them.
• High-precision models often use resin spacers for stability and low friction.
5. Inner and Outer Rings
• The inner ring is mounted on the shaft, while the outer ring is fixed to the housing.
• Both rings feature axial and radial raceways to accommodate combined loads.
6. Seals and Lubrication
• Most models are pre-lubricated with grease and sealed for maintenance convenience.
• Optional oil-air lubrication systems can be used for heavy-load or ultra-precise applications.

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2. Characteristics and Functions of Axial-Radial Bearings
1. Simultaneous Axial and Radial Load Support
• A single bearing can support bi-directional axial loads, radial loads, and moment loads.
• Integrates the functions of both a thrust bearing and a radial bearing.
2. High Rigidity and Load Capacity
• Utilizes line contact between rollers and raceways for superior stiffness and high load capability.
• Ideal for large-scale machinery and high-precision rotary tables.
3. High-Precision Positioning
• Axial and radial clearances can be minimized or preloaded for enhanced rigidity.
• Enables extremely accurate positioning for rotating platforms.
4. Compact Structure
• Combines multiple functions into a single bearing, minimizing installation space.
• Easy to install and maintain.

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3. Typical Applications
• CNC rotary tables / five-axis machining centers
• Vertical lathe spindles
• Gear testing instruments / precision measurement platforms
• Radar and satellite antenna rotation mechanisms
• Rotary modules in automation equipment