71911 CD/P4ATGB
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/P4ATGB Bearing Product Overview & Core Advantages
The 71911 CD/P4ATGB is a precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and rigidity. As a universal matchable (SU) bearing supplied in a set of three, it enables optimized preload configurations when mounted in pairs. Its P4A tolerance class ensures superior dimensional and running accuracy, making it ideal for high-speed spindles and precision machinery. The bearing features a 15° contact angle and light preload (Class B), delivering excellent performance under combined radial and axial loads while maintaining smooth operation at limiting speeds up to 34,000 rpm.
71911 CD/P4ATGB Bearing Model Code Explained, Specifications & Naming Convention
| Suffix | Technical Meaning | Performance Benefit |
|---|---|---|
| CD | 15° contact angle, universal matchable design | Optimized for combined loads and flexible mounting configurations |
| P4A | High precision tolerance class | Superior running accuracy and dimensional stability |
| TGB | Glass fiber reinforced phenolic cage | Excellent high-speed performance and lubrication compatibility |
71911 CD/P4ATGB Bearing Structural Features & Performance Benefits
High Precision Construction: Manufactured to P4A tolerance standards with bore and outside diameter tolerances of -0.004mm to 0, ensuring precise fit and minimal runout in critical applications.
Optimized Load Capacity: The 15° contact angle and 23 chrome steel balls provide balanced performance for combined radial and axial loads, with dynamic load rating of 9,360 lbf and static load rating of 9,900 lbf.
High-Speed Capability: The phenolic cage (TGB) and optimized internal geometry enable stable operation at limiting speeds of 34,000 rpm, reducing friction and heat generation.
Universal Matching Design: As an SU type universal matchable bearing supplied in sets of three, it allows for flexible mounting arrangements and precise preload control when used in pairs.
Material Excellence: Constructed from chrome steel for both rings and balls, providing high hardness, wear resistance, and dimensional stability across the operating temperature range of -30°C to 110°C.
71911 CD/P4ATGB Bearing Typical Application Areas
- Machine Tool Spindles: High-precision machining centers, grinding spindles, and CNC milling machines
- High-Speed Motors: Electric spindle motors, high-frequency motors, and servo drives
- Precision Instrumentation: Measuring equipment, optical instruments, and laboratory apparatus
- Aerospace Components: Gyroscopes, navigation systems, and aircraft instrumentation
- Medical Equipment: Dental handpieces, surgical tools, and diagnostic imaging systems
