71912 CDGA/P4A
71900 Series Super Precision Angular Contact Ball Bearings
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71912 CDGA/P4A Bearing Product Overview & Core Advantages
The 71912 CDGA/P4A is a single-row angular contact ball bearing designed for applications requiring ultra-high precision and exceptional rotational accuracy. Manufactured to P4A tolerance class, this bearing delivers superior dimensional stability and minimal runout. Its 15° contact angle provides optimal performance for combined loads, efficiently handling both radial and axial forces in one direction. The Extra Light (Class A) preload ensures minimal deflection under operational conditions, making it ideal for high-speed spindles and precision machinery where rigidity and accuracy are paramount.
71912 CDGA/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71912 | Basic bearing designation indicating size series and bore diameter |
| C | 15° contact angle design |
| DG | Universal Matchable (SU) bearing for duplex arrangements |
| A | Extra Light preload (Class A) |
| P4A | Super precision tolerance class exceeding ABEC 7 standards |
71912 CDGA/P4A Bearing Structural Features & Performance Benefits
Precision Engineering: The bearing features chrome steel rings and balls with P4A tolerance class manufacturing, ensuring exceptional dimensional accuracy and minimal vibration.
High-Speed Capability: The phenolic resin cage provides excellent strength-to-weight ratio, contributing to the bearing's limiting speed of 31,000 rpm while reducing centrifugal forces.
Optimized Load Distribution: With 24 precision balls of 7.938 mm diameter arranged at a 15° contact angle, the bearing efficiently handles combined radial and axial loads while maintaining high rigidity.
Universal Matching Design: The Universal Matchable (SU) feature allows for precise duplex mounting configurations (DB, DF, DT) without selective assembly, enabling optimal preload control and system stiffness.
Temperature Performance: Operating temperature range of -30°C to 110°C ensures reliable performance across various environmental conditions.
71912 CDGA/P4A Bearing Typical Application Areas
- Machine Tool Spindles - High-speed milling, grinding, and turning centers
- Precision Instrumentation - Measuring equipment and optical devices
- High-Speed Motors - Spindle motors and high-frequency applications
- Aerospace Components - Gyroscopes and navigation systems
- Medical Equipment - Dental handpieces and surgical tools
- Robotics - Precision joints and articulated arms
