71938 ACDGA/P4A
71900 Series Super Precision Angular Contact Ball Bearings
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71938 ACDGA/P4A Bearing Product Overview & Core Advantages
The 71938 ACDGA/P4A is a single-row angular contact ball bearing designed for high-precision applications requiring exceptional rotational accuracy and rigidity. Manufactured to P4A tolerance class, this bearing delivers superior dimensional stability and running accuracy. Its 25° contact angle provides optimal performance for combined loads, effectively handling both radial and substantial axial loads in one direction. The phenolic cage enables high-speed operation up to 11,000 rpm, while the universal matching capability allows for precise preload configuration in multi-bearing arrangements.
71938 ACDGA/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning | Performance Benefit |
|---|---|---|
| AC | Angular Contact Design | Optimized for combined radial and axial loads |
| DGA | Extra Light Preload (Class A) | Minimal friction, ideal for high-speed applications |
| P4A | Super Precision Tolerance | Exceptional running accuracy and dimensional stability |
71938 ACDGA/P4A Bearing Structural Features & Performance Benefits
High Precision Construction: Manufactured to P4A tolerance standards with bore and outside diameter tolerances of -0.004mm to 0, ensuring exceptional dimensional accuracy for critical applications.
Optimized Load Capacity: With a radial dynamic load rating of 36,675 lbf and radial static load rating of 46,800 lbf, this bearing provides reliable performance under demanding operating conditions.
High-Speed Performance: The phenolic cage material combined with the 25° contact angle enables stable operation at limiting speeds of 11,000 rpm, making it suitable for high-speed spindle applications.
Universal Matching Capability: Designed as Universal Matchable (SU), these bearings can be supplied in matched sets of 3, allowing for precise preload configuration and simplified installation in multi-bearing arrangements.
71938 ACDGA/P4A Bearing Typical Application Areas
- Machine Tool Spindles: High-precision machining centers and grinding spindles
- Precision Gearboxes: Industrial transmission systems requiring high accuracy
- Aerospace Components: Flight control systems and auxiliary power units
- Medical Equipment: High-speed dental handpieces and surgical tools
- Robotics: Precision joints and articulation points in industrial robots
- Test & Measurement Equipment: Coordinate measuring machines and optical inspection systems
