71907 CBGA/P4A
71900 Series Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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Product Overview and Core Advantages
The 71907 CBGA/P4A is a super-precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and rigidity. Manufactured to P4A tolerance class, this bearing delivers superior running accuracy and dimensional stability. Its extra light preload (Class A) ensures minimal deflection under operational loads, making it ideal for high-speed spindles and other precision machinery. The bearing is universally matchable (SU), allowing for flexible mounting configurations in pairs to handle combined loads effectively.
71907 CBGA/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71907 | Basic bearing designation (35mm bore, 55mm OD, 10mm width) |
| C | 15° contact angle design |
| B | 40° contact angle design (alternative configuration) |
| GA | Light preload designation |
| P4A | High precision tolerance class (superior to ABEC 7) |
Structural Features and Performance Benefits
High Precision Construction: Manufactured to P4A tolerance standards 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 provides excellent performance for combined radial and axial loads, with a dynamic load rating of 1141 lbf and static load rating of 821 lbf.
High-Speed Capability: Featuring a phenolic resin cage and optimized internal geometry, the bearing achieves a limiting speed of 56,000 rpm, making it suitable for high-speed applications.
Precision Materials: Constructed from chrome steel for both rings and balls, ensuring high durability and wear resistance in demanding operating conditions.
Thermal Stability: The phenolic cage material provides excellent dimensional stability across the operating temperature range of -30°C to 110°C.
71907 CBGA/P4A Bearing Typical Application Areas
The 71907 CBGA/P4A is specifically engineered for high-precision, high-speed applications including:
- Machine Tool Spindles: CNC machining centers, grinding spindles, and milling machine spindles
- Precision Instrumentation: Measuring equipment, optical instruments, and laboratory apparatus
- High-Speed Motors: Servo motors, spindle motors, and high-frequency electric motors
- Aerospace Components: Gyroscopes, navigation systems, and aircraft instrumentation
- Medical Equipment: Dental handpieces, surgical tools, and diagnostic imaging systems
