71907 ACDTP/P4B
71900 Series Super Precision Angular Contact Ball Bearings
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71907 ACDTP/P4B Bearing Product Overview & Core Advantages
The 71907 ACDTP/P4B is a single-row angular contact ball bearing engineered for applications demanding exceptional precision and high-speed performance. As a P4 (ABEC-7) tolerance class bearing, it guarantees superior running accuracy and rotational stability. Its core advantage lies in its ability to accommodate combined loads—significant radial loads and unidirectional axial loads—simultaneously. The 25° contact angle is optimized for high axial load capacity, while the phenolic cage and precision-ground components enable reliable operation at limiting speeds up to 22,000 rpm. This bearing is preloaded and pre-lubricated, making it an ideal, ready-to-install solution for high-rigidity, high-reliability spindle arrangements.
71907 ACDTP/P4B Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71907 | Basic bearing series and size designation (35mm bore, 55mm OD, 10mm width) |
| AC | Angular Contact design with a defined contact angle |
| D | High contact angle (25° in this case) |
| T | Phenolic (synthetic resin) cage |
| P | Precision tolerance class designation |
| P4B | P4 (ABEC-7) precision grade with specific internal clearance and geometrical tolerances |
71907 ACDTP/P4B Bearing Structural Features & Performance Benefits
- High-Speed Capability: The lightweight phenolic cage minimizes centrifugal forces and ensures stable operation at the high limiting speed of 22,000 rpm, reducing friction and heat generation.
- Superior Rigidity & Load Capacity: The 25° contact angle and optimized raceway geometry provide high axial rigidity and enable the bearing to support substantial combined radial and axial loads (Dynamic: 2077 lbf, Static: 1395 lbf).
- Precision Performance: Manufactured to P4 (ABEC-7) tolerance class with tight dimensional tolerances on bore, outside diameter, and width. This ensures minimal runout and vibration for applications requiring high rotational accuracy.
- Optimized Internal Design: Features 21 precision chrome steel balls of 5.556 mm diameter, contributing to smooth motion and high load distribution. The bearing is pre-lubricated for immediate operation within a temperature range of -30°C to 110°C.
71907 ACDTP/P4B Bearing Typical Application Areas
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Drives: High-frequency motors and spindles.
- Robotics: Joint and arm articulation requiring high rigidity and accuracy.
- Aerospace & Defense Systems: Gyroscopes, radar equipment, and control surface actuators.
