71920 ACEGA/P4A
71900 Series Super Precision Angular Contact Ball Bearings
Image may differ from product. See technical specification for details.
Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
- Fast delivery
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
71920 ACEGA/P4A Bearing Product Overview & Core Advantages
The 71920 ACEGA/P4A is a precision angular contact ball bearing designed for applications demanding exceptional accuracy and reliability. Manufactured to P4A tolerance class, this bearing delivers superior rotational precision and dimensional stability. Its 25° contact angle and extra light preload (Class A) configuration make it ideal for handling combined loads—simultaneously managing radial forces and substantial axial loads in one direction. The open design, combined with high-quality phenolic cage and precision-ground chrome steel components, ensures optimal performance in high-speed applications up to 16,000 rpm.
71920 ACEGA/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Performance Benefit |
|---|---|---|
| 71920 | Basic bearing series with 100mm bore, 140mm OD | Standard dimension compatibility |
| AC | 25° contact angle | Optimized for axial load capacity |
| EGA | Universal Matchable (SU) in sets of 4 | Precision matching for optimal preload |
| P4A | High precision tolerance class | Exceptional running accuracy and dimensional stability |
71920 ACEGA/P4A Bearing Structural Features & Performance Benefits
Precision Engineering: The P4A tolerance class ensures minimal runout and vibration, critical for high-speed precision applications. Bore and outside diameter tolerances of -0.004mm to 0 guarantee perfect fitment.
Optimized Load Capacity: With a 25° contact angle and extra light preload, this bearing achieves an optimal balance between radial and axial load handling. The radial dynamic load rating of 8348 lbf and static load rating of 6750 lbf provide reliable performance under demanding conditions.
High-Speed Capability: The phenolic cage and precision-ground chrome steel balls (12.7mm diameter, 24 pieces) enable smooth operation at limiting speeds of 16,000 rpm. The open design facilitates efficient lubrication management.
Universal Matching Design: As part of the Universal Matchable (SU) series, these bearings can be supplied in precision-matched sets of 4, ensuring consistent preload and optimal performance in multi-bearing arrangements.
71920 ACEGA/P4A Bearing Typical Application Areas
- Machine Tool Spindles: High-precision machining centers and grinding spindles requiring exceptional running accuracy
- High-Speed Robotic Systems: Industrial robots and automation equipment demanding precision motion control
- Precision Medical Equipment: Dental handpieces, laboratory centrifuges, and medical imaging devices
- Aerospace Components: Guidance systems, actuator mechanisms, and auxiliary power units
- Semiconductor Manufacturing: Wafer handling equipment and precision positioning stages
