71924 ACDGB/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 71924 ACDGB/P4A is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and performance. Positioned in the P4A tolerance class, this bearing delivers superior running accuracy and dimensional stability. Its key advantage lies in its ability to accommodate combined loads—simultaneously handling significant radial loads and axial loads in one direction. The Universal Matchable (SU) designation allows it to be easily mounted in pairs for increased rigidity and moment load capacity. With a light preload (Class B) and optimized 25° contact angle, it is engineered for high-speed operation up to 10,000 rpm, making it an ideal solution for high-precision, high-reliability systems.
71924 ACDGB/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71924 | Basic bearing designation indicating size series and bore diameter of 120mm |
| AC | Angular Contact design with 25° contact angle |
| D | High ball complement design for increased load capacity |
| GB | Universal Matchable bearing for paired mounting (SU designation) |
| P4A | High precision tolerance class with enhanced running accuracy |
Structural Features and Performance Benefits
Optimized Internal Geometry: The 71924 ACDGB/P4A features a 25° contact angle and 28 high-precision chrome steel balls with a diameter of 14.288 mm, providing an optimal balance between radial and axial load capacity. This configuration ensures superior high-speed performance while maintaining operational stability.
Precision Cage Design: The phenolic resin cage offers excellent strength-to-weight ratio and operates effectively across the entire temperature range (-30°C to 110°C). This material provides reduced friction and superior performance at high rotational speeds compared to metallic cages.
Enhanced Load Capacity: With a radial dynamic load rating of 16,380 lbf and radial static load rating of 19,462 lbf, this bearing delivers exceptional performance under demanding operating conditions. The high ball complement (D-design) significantly increases load-carrying capability.
Precision Manufacturing: Manufactured to P4A tolerance class with tight dimensional controls (bore diameter tolerance: -0.004mm to 0), this bearing ensures minimal runout and vibration, contributing to smoother operation and extended service life in precision applications.
71924 ACDGB/P4A Bearing Typical Application Areas
The 71924 ACDGB/P4A is specifically engineered for high-precision applications requiring exceptional accuracy and speed capabilities:
- Machine Tool Spindles: High-speed milling, grinding, and turning applications where precision and rigidity are critical
- Precision Gearboxes: Industrial transmission systems requiring high accuracy and reliability
- High-Speed Motors: Electric motors and generators operating at elevated speeds
- Aerospace Components: Control systems, actuators, and auxiliary power units
- Medical Equipment: High-speed dental handpieces, surgical tools, and diagnostic imaging systems
- Robotics and Automation: Precision joints, rotary tables, and positioning systems
