71930 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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71930 CDGA/P4A Bearing Product Overview & Core Advantages
The 71930 CDGA/P4A is a single-row angular contact ball bearing designed for high-precision applications requiring exceptional rotational accuracy and rigidity. Engineered to P4A tolerance class standards, this bearing delivers superior dimensional stability and running accuracy. Its 15° contact angle provides optimal performance for combined loads, effectively handling both radial and axial forces in one direction. The phenolic cage and factory-applied lubrication enable reliable operation at high speeds up to 11,000 rpm, making it an ideal solution for demanding precision machinery applications.
71930 CDGA/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71930 | Basic bearing designation with 150mm bore diameter |
| C | 15° contact angle design |
| DG | Universal matching designation for precision sets |
| A | Extra light preload classification |
| P4A | High precision tolerance class exceeding ABEC 7 standards |
71930 CDGA/P4A Bearing Structural Features & Performance Benefits
High Precision Construction: Manufactured to P4A tolerance class with extremely tight dimensional tolerances (bore/OD: -0.004mm to 0) ensuring minimal runout and vibration for precision applications.
Optimized Load Capacity: The 15° contact angle provides excellent performance for combined radial and axial loads, with dynamic load rating of 25,650 lbf and static load rating of 29,700 lbf.
High-Speed Capability: The phenolic resin cage offers superior strength-to-weight ratio and excellent sliding properties, enabling reliable operation at limiting speeds of 11,000 rpm.
Universal Matching Design: Designed as Universal Matchable (SU) bearings, allowing for precise preload control when used in matched sets of up to 4 bearings for maximum system rigidity.
Premium Material Selection: Constructed from chrome steel for both rings and balls, providing excellent wear resistance and dimensional stability across the operating temperature range of -30°C to 110°C.
71930 CDGA/P4A Bearing Typical Application Areas
- Machine Tool Spindles: High-speed milling, grinding, and turning spindles requiring P4A precision
- Precision Robotics: Robot arm joints and rotary tables demanding high accuracy and rigidity
- Aerospace Systems: Guidance systems, flight control mechanisms, and instrumentation
- Medical Equipment: High-speed dental handpieces, surgical robots, and diagnostic imaging systems
- Semiconductor Manufacturing: Wafer handling robots, precision positioning stages, and inspection equipment
