71906 CD/P4AQBCA
71900 Series Super Precision Angular Contact Ball Bearings
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71906 CD/P4AQBCA Bearing Product Overview & Core Advantages
The 71906 CD/P4AQBCA is a precision quadruplex angular contact ball bearing designed for applications requiring exceptional rigidity and accuracy. This P4A tolerance class bearing features a back-to-back quadruplex (QBC) matched arrangement, providing superior stability and the ability to handle combined radial and axial loads simultaneously. With its extra light preload (Class A) and phenolic cage, it is engineered for high-speed operation and precise performance in demanding industrial environments.
71906 CD/P4AQBCA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71906 | Basic bearing designation indicating size series and bore diameter |
| CD | Contact angle of 15° |
| P4A | High precision tolerance class with specific running accuracy requirements |
| QBC | Quadruplex Back-to-Back matched arrangement for maximum rigidity |
71906 CD/P4AQBCA Bearing Structural Features & Performance Benefits
High Rigidity Design: The quadruplex back-to-back arrangement creates an exceptionally stiff bearing system capable of resisting moment loads and maintaining precise alignment under heavy operating conditions.
Superior Load Capacity: With a 15° contact angle and optimized internal geometry, this bearing efficiently handles combined radial and axial loads while maintaining stable operation.
High-Speed Performance: The phenolic cage material and precision manufacturing enable operation at limiting speeds up to 100,500 rpm, making it ideal for high-speed spindle applications.
Precision Engineering: Manufactured to P4A tolerance class with tight dimensional control (bore tolerance: -0.004mm to 0), ensuring consistent performance and minimal runout in precision applications.
71906 CD/P4AQBCA Bearing Typical Application Areas
- Machine Tool Spindles - High-speed machining centers and precision grinding machines
- Precision Instrumentation - Measuring equipment and laboratory instruments requiring exceptional accuracy
- High-Speed Motors - Spindle motors and high-RPM drive systems
- Aerospace Components - Guidance systems and precision actuation mechanisms
- Medical Equipment - Dental handpieces and surgical tool drives
