71919 CD/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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71919 CD/P4A Bearing Product Overview & Core Advantages
The 71919 CD/P4A is a single-row angular contact ball bearing designed for applications requiring exceptional precision and high-speed performance. Engineered to P4 (ABEC-7) tolerance class, this bearing is optimized to handle significant axial loads in one direction combined with radial loads. Its 15° contact angle and phenolic cage contribute to its high-speed capabilities, making it an ideal solution for high-precision spindles and machinery where high rigidity and operational accuracy are critical.
71919 CD/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71919 | Basic bearing designation indicating dimensions: 95mm bore, 130mm OD, 18mm width |
| CD | Contact angle designation (15°) and optimized internal design for high-speed applications |
| P4A | Precision class designation equivalent to ABEC-7, with specific running accuracy requirements |
Structural Features & Performance Advantages
High-Speed Performance: The phenolic resin cage provides excellent dimensional stability and reduced weight, enabling operation at limiting speeds of 15,000 rpm. The optimized internal geometry minimizes friction and heat generation.
Precision Engineering: Manufactured to P4 tolerance class with tight dimensional tolerances (bore: -0.008mm to 0, OD: -0.009mm to 0), ensuring minimal runout and vibration for superior rotational accuracy.
Load Capacity: With a dynamic load rating of 11,115 lbf and static load rating of 12,375 lbf, this bearing delivers reliable performance under combined radial and axial loading conditions.
Material Quality: Constructed from chrome steel for both rings and balls, providing excellent hardness, wear resistance, and fatigue life. The open design allows for customized lubrication strategies.
71919 CD/P4A Bearing Typical Application Areas
The 71919 CD/P4A is specifically designed for demanding applications including:
- Machine Tool Spindles - High-speed machining centers and precision grinding machines
- Precision Instrumentation - Measuring equipment and laboratory instruments requiring minimal vibration
- High-Speed Motors - Electric spindle motors and high-frequency drive systems
- Aerospace Components - Gyroscopes, navigation systems, and auxiliary power units
- Medical Equipment - Dental handpieces and surgical tool drives
