71906/VA9D1
71900 Series Super Precision Angular Contact Ball Bearings
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71906/VA9D1 Bearing Product Overview & Core Advantages
The 71906/VA9D1 is a precision angular contact ball bearing designed for applications requiring exceptional accuracy and performance. Engineered to a P4 tolerance class, this bearing delivers superior rotational precision and dimensional stability. Its 25° contact angle enables it to efficiently handle combined loads—simultaneously supporting significant radial loads and substantial axial loads in one direction. The phenolic cage and optimized internal geometry contribute to its high-speed capability with a limiting speed of 72,500 rpm. Preloaded and available as a Universal Matchable (SU) single bearing, it is ideal for demanding, high-rigidity applications where minimal deflection is critical.
71906/VA9D1 Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71906 | Basic bearing designation indicating a lightweight, thin-section angular contact bearing series with a 30mm bore diameter. |
| VA9D1 | Internal manufacturer's designation specifying the preload level and Universal Matchable (SU) pairing configuration for precise axial play control. |
71906/VA9D1 Bearing Structural Features & Performance Benefits
- High Rigidity & Precision: Manufactured to P4 tolerance class with a phenolic resin cage, this bearing ensures minimal runout and high dimensional stability, providing superior support for spindles and precision shafts.
- Combined Load Capacity: The 25° contact angle is optimized to handle significant combined radial and axial loads simultaneously, making it suitable for applications with complex loading conditions.
- High-Speed Performance: The lightweight phenolic cage reduces centrifugal forces, while the precision-ground chrome steel components and optimized internal geometry enable stable operation at high rotational speeds up to 72,500 rpm.
- Preload & Matching: Supplied with a predefined preload, the bearing eliminates internal clearance for enhanced stiffness. Its Universal Matchable (SU) designation allows for precise pairing with another identical bearing to form a matched set for optimal performance in duplex arrangements.
71906/VA9D1 Bearing Typical Application Areas
- Machine Tool Spindles: High-precision machining centers, grinding spindles, and CNC milling heads.
- High-Speed Drives: Electric motor spindles, turbochargers, and compressor shafts.
- Precision Instruments: Measuring equipment, optical scanners, and semiconductor manufacturing machinery.
- Aerospace & Defense: Gyroscopes, radar systems, and navigation equipment requiring high accuracy and reliability.
