71938 CDGB/P4A
71900 Series Super Precision Angular Contact Ball Bearings
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71938 CDGB/P4A Bearing Product Overview & Core Advantages
The 71938 CDGB/P4A is a super-precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and rigidity. Operating under the stringent P4A tolerance class, this bearing is engineered to handle combined loads with high reliability. Its 15° contact angle and Universal Matchable (SU) designation make it ideal for high-speed spindle arrangements, providing superior performance in machine tool and other precision machinery applications.
71938 CDGB/P4A Bearing Model Code Explained, Specifications & Naming Convention
- 71938: Basic bearing designation (190mm bore, 260mm OD, 33mm width)
- C: 15° contact angle design
- D: Light preload (Class B)
- GB: Phenolic cage material
- P4A: Superior precision tolerance class exceeding ABEC 7
71938 CDGB/P4A Bearing Structural Features & Performance Benefits
High Rigidity & Precision: Manufactured to P4A tolerance standards with extremely tight dimensional control (bore/OD tolerance: -0.004mm to 0), this bearing ensures minimal runout and vibration for superior machining accuracy.
Optimized Load Capacity: The 15° contact angle configuration provides excellent capability for handling combined radial and axial loads, with dynamic load rating of 38,700 lbf and static load rating of 49,500 lbf.
High-Speed Performance: The phenolic cage and optimized internal geometry enable operation at limiting speeds up to 16,250 rpm, making it suitable for demanding spindle applications.
Precision Matching: As a Universal Matchable (SU) bearing, it can be supplied in matched sets of 4 for preloaded arrangements, ensuring optimal stiffness and performance in multi-bearing configurations.
71938 CDGB/P4A Bearing Typical Application Areas
The 71938 CDGB/P4A finds extensive use in high-precision industries including:
- Machine Tool Spindles - CNC machining centers, grinding spindles
- Precision Industrial Equipment - High-speed routers, precision grinders
- Automation Systems - Robotic arm joints, precision positioning systems
- Aerospace Components - Guidance systems, instrument bearings
- Medical Equipment - Dental handpieces, surgical tool spindles
