71934 CD/P4AQBCD
71900 Series Super Precision Angular Contact Ball Bearings
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71934 CD/P4AQBCD Bearing Product Overview & Core Advantages
The 71934 CD/P4AQBCD is a high-precision quadruplex angular contact ball bearing designed for extreme rigidity and load capacity in demanding applications. This metric system bearing features a back-to-back quadruplex arrangement with heavy preload (Class D), delivering exceptional stability and resistance to complex combined loads. Its P4A tolerance class ensures superior running accuracy, making it ideal for high-speed, high-rigidity machinery requiring uncompromising performance.
71934 CD/P4AQBCD Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71934 | Basic bearing series and size designation |
| CD | 15° contact angle design |
| P4A | High precision tolerance class |
| QBC | Quadruplex Back-to-Back matched arrangement |
| D | Heavy preload classification |
71934 CD/P4AQBCD Bearing Structural Features & Performance Benefits
Exceptional Rigidity: The quadruplex back-to-back configuration with heavy preload creates an extremely stiff bearing system that minimizes deflection under heavy loads and moments.
Superior Load Capacity: With a radial dynamic load rating of 77,625 lbf and static load rating of 150,750 lbf, this bearing handles significant combined radial and axial loads simultaneously.
High-Speed Capability: The phenolic cage material and optimized 15° contact angle enable reliable operation at limiting speeds up to 16,250 rpm.
Precision Performance: Manufactured to P4A tolerance class with tight dimensional controls (bore and OD tolerance: -0.004mm to 0), ensuring minimal runout and vibration.
Durability: Constructed from chrome steel for both rings and balls, providing excellent wear resistance and fatigue life in demanding applications.
71934 CD/P4AQBCD Bearing Typical Application Areas
- Machine tool spindles for high-precision machining centers
- High-speed machining heads requiring extreme rigidity
- Precision grinding spindles in industrial manufacturing
- Aerospace positioning systems demanding high accuracy
- Robotic arm joints requiring high moment capacity
- Specialized industrial machinery with complex load requirements
