71924 ACB/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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71924 ACB/P4A Bearing Product Overview & Core Advantages
The 71924 ACB/P4A is a single-row angular contact ball bearing designed for applications requiring exceptional precision and high-speed performance. Engineered to withstand combined radial and axial loads in one direction, this bearing features a 25° contact angle for optimal axial load capacity. Manufactured to P4 (ABEC-7) tolerance class, it delivers superior running accuracy, making it ideal for high-precision machinery and equipment where minimal vibration and high rotational accuracy are critical.
71924 ACB/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71924 | Basic bearing series and size designation (120mm bore, 165mm OD, 22mm width) |
| ACB | Angular Contact Bearing design with a 25° contact angle and specific internal geometry optimized for high-speed operation |
| P4A | P4 tolerance class (equivalent to ABEC-7) with specific running accuracy requirements and preload availability for enhanced rigidity |
71924 ACB/P4A Bearing Structural Features & Performance Benefits
High-Speed Capability: The phenolic resin cage provides excellent strength-to-weight ratio and reduced friction, enabling the bearing to achieve a limiting speed of 14,000 rpm. Combined with factory-applied lubrication, this ensures stable operation at high rotational speeds.
Precision Performance: Manufactured to P4 precision class with tight dimensional tolerances (bore: -0.008mm to 0, OD: -0.01mm to 0), this bearing delivers exceptional running accuracy and minimal vibration for demanding applications.
Load Capacity: With a radial dynamic load rating of 5,738 lbf and static load rating of 6,412 lbf, the bearing effectively handles combined loads while maintaining precision. The 25° contact angle provides superior axial load capacity in one direction.
Material Excellence: Constructed from chrome steel for both rings and balls, the bearing offers high hardness, wear resistance, and dimensional stability across the operating temperature range of -30°C to 110°C.
71924 ACB/P4A Bearing Typical Application Areas
The 71924 ACB/P4A is particularly suited for high-precision, high-speed applications including:
- Machine tool spindles and high-speed machining centers
- Precision grinding equipment and industrial spindles
- High-speed motors and servo drives
- Aerospace components and precision instruments
- Medical equipment requiring high rotational accuracy
