71921 CD/P4ADGA
71900 Series Super Precision Angular Contact Ball Bearings
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71921 CD/P4ADGA Bearing Product Overview & Core Advantages
The 71921 CD/P4ADGA is a super-precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and high rigidity. Operating under P4A tolerance class, this bearing excels in handling combined radial and axial loads simultaneously. Its universal matchable (SU) design allows for flexible mounting in pairs to support complex load configurations, making it an ideal choice for high-speed spindles and other precision machinery where reliability and performance are critical.
71921 CD/P4ADGA Bearing Model Code Explained, Specifications & Naming Convention
| Suffix | Technical Meaning |
|---|---|
| CD | Optimized internal geometry for high-speed operation and low torque |
| P4A | Super-precision tolerance class with enhanced running accuracy |
| DGA | Universal matchable (SU) bearing pair with specific preload |
71921 CD/P4ADGA Bearing Structural Features & Performance Benefits
High Precision & Rigidity: Manufactured to P4A tolerance class with extremely tight dimensional tolerances, this bearing ensures minimal runout and vibration. The 15° contact angle and optimized internal geometry provide excellent rigidity for demanding applications.
Superior Load Capacity: With a dynamic load rating of 22,388 lbf and static load rating of 30,825 lbf, this bearing reliably handles significant combined loads while maintaining precision.
High-Speed Capability: The phenolic resin cage and precision-ground components enable operation at limiting speeds up to 16,000 rpm, making it suitable for high-speed spindle applications.
Universal Matching Design: As a universal matchable (SU) bearing, it can be paired in various configurations (back-to-back, face-to-face, or tandem) to accommodate different load requirements and mounting arrangements.
71921 CD/P4ADGA Bearing Typical Application Areas
- Machine Tool Spindles - High-precision machining centers and grinding machines
- High-Speed Spindles - CNC milling, drilling, and routing equipment
- Precision Instrumentation - Measuring devices and laboratory equipment
- Aerospace Components - Guidance systems and precision actuators
- Medical Equipment - High-speed dental handpieces and surgical tools
