71813 ACDGB/VQ253
71800 Series Super Precision Angular Contact Ball Bearings
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71813 ACDGB/VQ253 Bearing Product Overview & Core Advantages
The 71813 ACDGB/VQ253 is a single row angular contact ball bearing designed for high-precision applications requiring exceptional rotational accuracy and rigidity. This metric bearing features a light preload (Class B) for reduced system vibration and precise shaft positioning. Its optimized 25° contact angle provides superior axial load capacity in one direction while maintaining excellent radial load handling. Manufactured from chrome steel with a phenolic cage, it delivers reliable performance in high-speed applications up to 36,000 rpm.
71813 ACDGB/VQ253 Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71813 | Basic bearing designation with 65mm bore, 85mm OD, 10mm width |
| AC | Angular Contact design with 25° contact angle |
| DGB | Universal matching bearing designation for back-to-back arrangement |
| VQ253 | Special lubrication code for optimized performance |
71813 ACDGB/VQ253 Bearing Structural Features & Performance Benefits
High-Speed Capability: The phenolic resin cage provides excellent strength-to-weight ratio, reducing centrifugal forces and enabling operation at 36,000 rpm limiting speed. The optimized ball quantity (29) and ball diameter (5.556mm) ensure smooth rotation and vibration reduction.
Precision Engineering: Manufactured to NSTD tolerance class with tight dimensional control (bore tolerance: -0.004mm to 0, OD tolerance: -0.004mm to 0), ensuring consistent performance in precision applications.
Load Capacity: The 25° contact angle design provides excellent combined load capacity, with radial dynamic load rating of 2858 lbf and radial static load rating of 3150 lbf.
Thermal Stability: Phenolic cage material and specialized lubrication enable reliable operation across a temperature range of -30°C to 110°C.
71813 ACDGB/VQ253 Bearing Typical Application Areas
- Machine Tool Spindles - High-speed machining centers and precision lathes
- Precision Grinding Spindles - Applications requiring minimal runout and vibration
- High-Speed Motors - Electric motors and generators operating at elevated speeds
- Medical Equipment - Dental handpieces and surgical tools
- Aerospace Components - Actuators and control systems requiring reliability
- Robotics - Joint mechanisms and precision positioning systems
