71908 CDTP/P4B
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 71908 CDTP/P4B is a single-row angular contact ball bearing designed for applications requiring exceptional precision and high-speed performance. Manufactured to P4 (ABEC-7) tolerance class, this bearing delivers superior running accuracy and rotational stability. Its key advantage lies in its ability to accommodate combined loads—handling significant radial loads alongside substantial axial loads in one direction. The phenolic cage and optimized 15° contact angle contribute to its high-speed capabilities, making it an ideal solution for demanding, high-rigidity applications where precision is paramount.
71908 CDTP/P4B Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71908 | Basic bearing designation indicating size series (719) and bore diameter (08×5=40mm) |
| C | 15° contact angle design |
| DT | Matched pair arrangement in tandem configuration |
| P | Preload class designation |
| P4B | P4 tolerance class with specific running accuracy requirements |
Structural Features and Performance Benefits
High Precision Construction: Manufactured to P4 tolerance class with strict dimensional control (bore diameter tolerance: -0.006mm to 0), ensuring exceptional running accuracy and minimal vibration.
Optimized Contact Design: The 15° contact angle provides optimal balance between radial and axial load capacity, making it suitable for combined loading conditions.
High-Speed Performance: The phenolic resin cage enables superior performance at high rotational speeds (limiting speed: 22,000 rpm), reducing friction and heat generation.
Enhanced Rigidity: The matched pair arrangement (DT suffix) provides increased system stiffness and improved axial guidance for precision applications.
Superior Load Capacity: With a dynamic load rating of 2790 lbf and static load rating of 1912 lbf, this bearing delivers reliable performance under demanding operating conditions.
71908 CDTP/P4B Bearing Typical Application Areas
The 71908 CDTP/P4B is specifically engineered for high-precision, high-speed applications including:
- Machine Tool Spindles - Providing precise rotational accuracy and rigidity for milling, grinding, and turning operations
- Precision Gearboxes - Ensuring smooth operation and extended service life in industrial transmission systems
- High-Speed Motors - Supporting demanding rotational requirements in servo motors and spindle drives
- Medical Equipment - Used in diagnostic imaging systems and laboratory instrumentation requiring vibration-free operation
- Aerospace Components - Applied in auxiliary systems where reliability and precision are critical
