71901 CDGB/P4A
71900 Series Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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71901 CDGB/P4A Bearing Product Overview & Core Advantages
The 71901 CDGB/P4A is a precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and high-speed performance. As a single bearing from a universally matchable (SU) pair, it enables precise preload control when mounted with its counterpart. Its P4A tolerance class ensures superior dimensional and running accuracy, making it ideal for high-reliability applications requiring minimal runout and vibration. The bearing is pre-lubricated and features a light preload (Class B), providing immediate operational readiness and stable performance under combined radial and axial loads.
71901 CDGB/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71901 | Bearing series and size designation (12mm bore, 24mm OD, 6mm width) |
| C | 15° contact angle |
| DG | Universal Matchable bearing (can be paired for duplex arrangements) |
| B | Light preload / Class B |
| P4A | High precision tolerance class (superior to ABEC 7) |
71901 CDGB/P4A Bearing Structural Features & Performance Benefits
High-Speed Capability: The phenolic resin cage provides excellent dimensional stability and low friction at high rotational speeds, supporting the limiting speed of 220,000 rpm. The optimized 15° contact angle balances axial and radial load capacity while minimizing heat generation.
Precision Performance: Manufactured to P4A tolerance standards with tight dimensional controls (bore/OD tolerance: -0.004mm to 0), this bearing ensures minimal runout and vibration for precision applications.
Universal Matching Design: As part of a universally matchable pair, these bearings can be arranged in duplex configurations (back-to-back, face-to-face, or tandem) to achieve specific stiffness and moment load requirements.
Material Excellence: Constructed from chrome steel for both rings and balls, providing high hardness, wear resistance, and dimensional stability across the operating temperature range of -30°C to 110°C.
71901 CDGB/P4A Bearing Typical Application Areas
- High-speed machine tool spindles and precision machining centers
- Precision instruments and measuring equipment
- High-frequency spindle motors and dental handpieces
- Aerospace components and navigation systems
- Semiconductor manufacturing equipment and robotic joints
