71901 CDGA/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 CDGA/P4A Bearing Product Overview & Core Advantages
The 71901 CDGA/P4A is a single-row angular contact ball bearing designed for applications demanding exceptional precision and high-speed performance. Engineered to support combined loads (radial and axial loads in one direction), this bearing features an extra light preload (Class A) and P4A super-precision tolerance, ensuring minimal vibration and optimal rotational accuracy. Its compact design, with a 12 mm bore and 6 mm width, makes it ideal for space-constrained, high-reliability applications such as precision spindles.
71901 CDGA/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71901 | Basic bearing designation (12 mm bore, 24 mm OD) |
| C | 15° contact angle optimized for high-speed operation |
| DG | Universal Matchable (SU) - bearings can be paired for duplex arrangements |
| A | Extra light preload (Class A) for minimal friction and heat generation |
| P4A | Super-precision tolerance class exceeding ABEC 7 standards |
71901 CDGA/P4A Bearing Structural Features & Performance Benefits
High-Speed Capability: The phenolic resin cage and 15° contact angle enable exceptional limiting speeds up to 220,000 rpm, reducing centrifugal forces and maintaining stability at high rotational velocities.
Precision Engineering: Manufactured to P4A tolerance class with bore and outside diameter tolerances of -0.004mm to 0, ensuring exact dimensional control for applications requiring minimal runout and vibration.
Optimized Load Capacity: With a radial dynamic load rating of 596 lbf and radial static load rating of 281 lbf, this bearing efficiently handles combined loads while maintaining precision under operational stresses.
Material Excellence: Constructed from chrome steel for both rings and balls, providing superior hardness, wear resistance, and dimensional stability across the operating temperature range of -30°C to 110°C.
71901 CDGA/P4A Bearing Typical Application Areas
The 71901 CDGA/P4A is specifically engineered for high-precision, high-speed applications including:
- Machine tool spindles and high-speed machining centers
- Precision instrumentation and measuring equipment
- Dental handpieces and medical drilling devices
- Small precision motors and servo systems
- Optical positioning systems and scanner mechanisms
