71911 CD/P4ADGB
71900 Series Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
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Materials
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71911 CD/P4ADGB Bearing Product Overview & Core Advantages
The 71911 CD/P4ADGB is a precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and rigidity. Manufactured to ABEC 7/P4A tolerance class, this bearing delivers superior running precision. Its 15° contact angle and Universal Matchable (SU) design enable it to handle combined loads efficiently while being configured in pairs for optimal performance. The bearing features a light preload (Class B) for reduced noise and vibration, making it ideal for high-speed applications up to 34,000 rpm. Its compact design with a 55 mm bore, 80 mm OD, and 26 mm width provides a high-performance solution in a minimal envelope.
71911 CD/P4ADGB Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71911 | Basic bearing designation indicating size series and bore diameter |
| CD | Contact angle designation (15°) |
| P4A | High precision tolerance class equivalent to ABEC 7 |
| DGB | Universal Matchable (SU) designation for paired mounting |
71911 CD/P4ADGB Bearing Structural Features & Performance Benefits
High Precision Construction: Manufactured to P4A tolerance class with tight dimensional control (bore/OD tolerance: -0.004mm to 0) ensures exceptional running accuracy and minimal vibration.
Optimized Load Capacity: The 15° contact angle configuration provides excellent capability for handling combined radial and axial loads, with dynamic load rating of 7020 lbf and static load rating of 6525 lbf.
High-Speed Performance: The phenolic cage and optimized internal geometry enable stable operation at limiting speeds of 34,000 rpm, making it suitable for demanding high-speed applications.
Universal Matching Capability: As a Universal Matchable (SU) bearing, it can be paired with another identical bearing in various configurations (back-to-back, face-to-face, or tandem) without requiring selective matching.
Premium Material Selection: Constructed from chrome steel for both rings and balls, ensuring high durability and long service life under demanding operating conditions.
71911 CD/P4ADGB Bearing Typical Application Areas
- Machine Tool Spindles: High-precision machining centers and grinding spindles requiring exceptional accuracy
- High-Speed Motors: Electric motors and spindles operating at elevated rotational speeds
- Precision Instrumentation: Measuring equipment and analytical instruments demanding minimal runout
- Aerospace Components: Guidance systems and auxiliary power units requiring reliable performance
- Medical Equipment: High-speed dental handpieces and surgical tools
