71907 ACD/P4AQGA
71900 Series Super Precision Angular Contact Ball Bearings
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71907 ACD/P4AQGA Bearing Product Overview & Core Advantages
The 71907 ACD/P4AQGA is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and reliability. Engineered to accommodate combined loads, this bearing simultaneously handles radial loads and substantial axial loads in one direction. Its extra light preload (Class A) ensures minimal deflection under operational stresses, making it ideal for high-speed applications where rotational accuracy is paramount. Manufactured to P4A tolerance class, this bearing delivers superior dimensional stability and running precision.
71907 ACD/P4AQGA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71907 | Basic bearing series with 35mm bore, 55mm OD |
| ACD | 25° contact angle design for optimal axial load capacity |
| P4A | High precision tolerance class with enhanced running accuracy |
| QGA | Universal matchable (SU) designation for preloaded sets |
71907 ACD/P4AQGA Bearing Structural Features & Performance Benefits
Precision Engineering: Manufactured to P4A tolerance class with bore and outside diameter tolerances of -0.004mm to 0, ensuring exceptional dimensional accuracy and consistent performance.
Optimized Load Capacity: The 25° contact angle and 21 chrome steel balls provide superior combined load handling with dynamic radial load rating of 5445 lbf and static radial load rating of 5512 lbf.
High-Speed Capability: The phenolic cage enables stable operation at limiting speeds up to 56,000 rpm, while the open design facilitates efficient lubrication management.
Thermal Stability: Operating temperature range from -30°C to 110°C ensures reliable performance across diverse environmental conditions.
Universal Matching: Designed as Universal Matchable (SU) bearings, allowing precise preload arrangement when used in sets of four for optimal stiffness and accuracy.
71907 ACD/P4AQGA Bearing Typical Application Areas
- Machine tool spindles requiring high precision and rigidity
- High-speed machining centers and precision grinding equipment
- Industrial pumps and compressors operating at elevated speeds
- Precision instruments and measuring equipment
- Aerospace components demanding exceptional accuracy and reliability
- Robotic positioning systems requiring minimal deflection and high stiffness
