71917 CDGB/P4A
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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71917 CDGB/P4A Bearing Product Overview & Core Advantages
The 71917 CDGB/P4A is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional rotational accuracy and rigidity. Manufactured to P4A tolerance class, this bearing delivers superior running precision. Its 15° contact angle and light preload (Class B) are optimized for high-speed operation while providing excellent resistance to combined loads (radial and axial). As part of a Universal Matchable (SU) set, it enables precise preload control when mounted with other bearings from the same group, making it ideal for high-reliability, high-speed spindles and precision machinery.
Model Code Breakdown
| Code Segment | Technical Meaning |
|---|---|
| 71917 | Basic bearing designation (85mm bore, 120mm OD, 18mm width) |
| C | 15° contact angle |
| D | Light preload (Class B) |
| G | Universal Matchable (SU) bearing |
| B | 40° contact angle modification (enhanced axial load capacity) |
| P4A | High precision tolerance class (superior dimensional and running accuracy) |
71917 CDGB/P4A Bearing Structural Features & Performance Benefits
Precision Engineering: Manufactured to P4A tolerance class with extremely tight dimensional tolerances (bore/OD tolerance: -0.004mm to 0), ensuring minimal runout and vibration for superior rotational accuracy.
High-Speed Capability: The phenolic resin cage and optimized 15° contact angle with light preload enable exceptional limiting speeds up to 17,000 rpm, making it suitable for high-speed spindle applications.
Superior Load Capacity: With a dynamic load rating of 10,395 lbf and static load rating of 10,800 lbf, this bearing effectively handles combined radial and axial loads. The angular contact design provides excellent axial rigidity.
Universal Matching Design: As a Universal Matchable (SU) bearing supplied in sets of 3, it allows for precise preload adjustment when mounted in pairs or groups, eliminating the need for selective assembly and ensuring optimal performance.
Material Excellence: Constructed from chrome steel for both rings and balls, providing high hardness, wear resistance, and durability under demanding operating conditions.
71917 CDGB/P4A Bearing Typical Application Areas
- Machine Tool Spindles: High-speed milling, grinding, and turning spindles requiring precision and rigidity
- Precision Instrumentation: Measuring equipment, optical instruments, and laboratory apparatus
- High-Speed Motors: Servo motors, spindle motors, and other high-RPM electric motors
- Aerospace Components: Guidance systems, gyroscopes, and other precision aerospace mechanisms
- Medical Equipment: Dental handpieces, surgical tools, and diagnostic imaging systems
