71930 ACD/P4AQGA
71900 Series Super Precision Angular Contact Ball Bearings
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71930 ACD/P4AQGA Bearing Product Overview & Core Advantages
The 71930 ACD/P4AQGA is a precision angular contact ball bearing engineered for applications demanding exceptional accuracy and reliability. This universally matchable (SU) bearing is designed to accommodate combined loads, handling significant radial and axial loads simultaneously. Its extra light preload (Class A) ensures minimal deflection and smooth operation, making it ideal for high-precision systems. Manufactured to P4A tolerance class, it guarantees superior dimensional stability and running accuracy. The phenolic cage and optimized 25° contact angle contribute to its outstanding high-speed performance and operational stability.
71930 ACD/P4AQGA Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning | Performance Advantage |
|---|---|---|
| ACD | 25° Contact Angle | Optimized for axial load capacity and high-speed operation |
| P4A | High Precision Tolerance Class | Superior running accuracy and dimensional stability |
| QGA | Universal Matchable (SU) with Extra Light Preload | Enables flexible bearing arrangements with minimal deflection |
71930 ACD/P4AQGA Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The angular contact design with 25° contact angle provides excellent rigidity and enables the bearing to handle substantial combined radial and axial loads. With a dynamic load rating of 64,350 lbf and static load rating of 112,500 lbf, it ensures reliable performance under demanding conditions.
High-Speed Performance: The phenolic cage material and optimized internal geometry contribute to superior high-speed capability, achieving a limiting speed of 11,000 rpm. The precision manufacturing to P4A tolerance class ensures minimal vibration and heat generation at high rotational speeds.
Precision Engineering: Manufactured with chrome steel rings and balls, the bearing offers exceptional durability and wear resistance. The tight dimensional tolerances on bore diameter (150 mm ±0.004mm) and outside diameter (210 mm ±0.004mm) guarantee precise fit and optimal performance in precision applications.
Universal Matching Capability: As a universally matchable (SU) bearing, it can be arranged in various configurations (back-to-back, face-to-face, or tandem) with other identical bearings, providing design flexibility for complex load requirements.
71930 ACD/P4AQGA Bearing Typical Application Areas
- Machine Tool Spindles: High-precision machining centers and grinding machine spindles
- Precision Instrumentation: Measuring equipment and laboratory instruments requiring extreme accuracy
- High-Speed Rotating Machinery: Turbines, compressors, and pumps operating at elevated speeds
- Aerospace Systems: Guidance systems and aircraft instrumentation requiring reliable precision bearings
- Medical Equipment: High-speed dental handpieces and medical imaging devices
- Robotics & Automation: Precision robotic joints and automated manufacturing equipment
