71917 ACB/P4A
71900 Series Super Precision Angular Contact Ball Bearings
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71917 ACB/P4A Bearing Product Overview & Core Advantages
The 71917 ACB/P4A is a single-row angular contact ball bearing designed for applications requiring high precision and superior rotational accuracy. Engineered to P4 (ABEC-7) tolerance class, it excels in handling combined loads, primarily carrying axial loads in one direction and moderate radial loads simultaneously. Its compact design with an 18mm width and optimized 25° contact angle provides excellent operational stability and rigidity, making it ideal for high-speed spindles and precision machinery where space constraints and performance reliability are critical.
71917 ACB/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71917 | Basic bearing series designation for metric angular contact bearings |
| ACB | Angular Contact Bearing designation with specific internal design |
| P4A | P4 precision class (ABEC-7) with specific tolerance and running accuracy requirements |
71917 ACB/P4A Bearing Structural Features & Performance Benefits
High Precision Construction: Manufactured to P4 tolerance class with bore and outside diameter tolerances of -0.008mm to 0, ensuring exceptional running accuracy and minimal vibration.
Optimized Load Capacity: The 25° contact angle and 37 chrome steel balls provide superior axial load capacity while maintaining good radial load capability, with both dynamic and static load ratings of 3442 lbf.
High-Speed Performance: Featuring a phenolic resin cage that enables operation at limiting speeds up to 20,000 rpm, making it suitable for high-speed applications.
Thermal Stability: The phenolic cage material and chrome steel construction maintain dimensional stability across the operating temperature range of -30° to 110°C.
Preload Availability: Designed to accommodate preload for enhanced stiffness and precise positioning in demanding applications.
71917 ACB/P4A Bearing Typical Application Areas
This precision angular contact bearing is specifically engineered for:
- Machine Tool Spindles - High-speed machining centers and precision lathes
- Precision Grinding Spindles - Applications requiring ultra-precise rotational accuracy
- High-Speed Motors - Electric motors and spindle drives operating at elevated speeds
- Medical Equipment - Dental handpieces and surgical tool drives
- Aerospace Components - Guidance systems and precision instrumentation
- Robotics - High-precision robotic joints and positioning systems
