71910 CDGC/P4A
71900 Series Super Precision Angular Contact Ball Bearings
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71910 CDGC/P4A Bearing Product Overview & Core Advantages
The 71910 CDGC/P4A is a single-row angular contact ball bearing engineered for applications demanding high precision and superior running accuracy. Operating under the stringent P4A tolerance class, this bearing is designed to handle significant combined loads (radial and axial) simultaneously. Its 15° contact angle and Moderate preload (Class C) provide exceptional rotational rigidity and precise shaft positioning, making it ideal for high-speed spindles and other precision machinery. As a Universal Matchable (SU) bearing, it can be supplied in sets of three for optimized performance in duplex arrangements.
71910 CDGC/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Significance |
|---|---|---|
| 71910 | Basic bearing series and size designation | Indicates a high-precision angular contact bearing with 50mm bore, 72mm OD, and 12mm width. |
| C | 15° contact angle | Optimized for handling combined radial and axial loads efficiently. |
| DG | Universal Matchable bearing (SU designation) | Can be paired in any combination (back-to-back, face-to-face, or tandem) without selective mounting. |
| C | Moderate preload (Class C) | Provides increased stiffness and reduced axial/radial play for enhanced precision. |
| P4A | High precision tolerance class | Exceeds ABEC 7 standards, ensuring extremely tight dimensional and running accuracy tolerances. |
71910 CDGC/P4A Bearing Structural Features & Performance Benefits
High Precision Construction: Manufactured to P4A tolerance class with bore and outside diameter tolerances of -0.004mm to 0, ensuring exceptional dimensional stability and running accuracy.
Optimized Load Capacity: The 15° contact angle design enables the bearing to handle significant combined loads, with a dynamic load rating of 3038 lbf and static load rating of 2340 lbf.
High-Speed Performance: The phenolic resin cage and precision-ground chrome steel balls (6.35mm diameter, 25 count) contribute to smooth operation at limiting speeds up to 46,000 rpm.
Enhanced Rigidity: The Moderate preload (Class C) configuration provides superior rotational stiffness, minimizing deflection under load for precise shaft positioning.
Universal Matching Capability: As a Universal Matchable (SU) bearing, it can be supplied in sets (typically 3 bearings) for optimized performance in various mounting arrangements without selective assembly.
71910 CDGC/P4A Bearing Typical Application Areas
The 71910 CDGC/P4A is ideally suited for high-precision, high-speed applications including:
- Machine Tool Spindles - High-speed milling, grinding, and turning centers
- Precision Robotics - Joint and arm positioning systems
- Aerospace Systems - Gyroscopes, navigation instruments, and flight control mechanisms
- Medical Equipment - Dental handpieces, surgical tools, and imaging systems
- High-Frequency Spindles - PCB drilling, semiconductor manufacturing equipment
