71813 CDGA/P4
71800 Series Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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71813 CDGA/P4 Bearing Product Overview & Core Advantages
The 71813 CDGA/P4 is a single-row angular contact ball bearing designed for high-precision applications requiring exceptional rotational accuracy and rigidity. Manufactured to P4 tolerance class, this bearing delivers superior running precision and dimensional stability. Its 15° contact angle is optimized to handle combined loads, efficiently supporting both radial and significant axial loads in one direction. The phenolic cage and universal matching capability make it particularly suitable for high-speed spindle arrangements and precision machinery where minimal deflection and thermal stability are critical.
71813 CDGA/P4 Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Performance Impact |
|---|---|---|
| 71813 | Basic bearing designation (65mm bore, 85mm OD, 10mm width) | Defines core bearing dimensions and geometry |
| C | 15° contact angle design | Optimized for combined radial and axial load capacity |
| DG | Universal matching designation | Enables precise preload control in multi-bearing arrangements |
| A | Extra light preload class | Minimizes friction while maintaining stiffness at high speeds |
| P4 | Super precision tolerance class | Ensures exceptional running accuracy and dimensional stability |
71813 CDGA/P4 Bearing Structural Features & Performance Benefits
High Precision Construction: Manufactured to P4 tolerance standards with bore and outside diameter tolerances of -0.004mm to 0, ensuring exceptional dimensional accuracy and runout control for precision applications.
Optimized Load Capacity: The 15° contact angle design provides balanced performance for both radial loads (3038 lbf dynamic) and axial loads, making it ideal for applications with combined loading conditions.
High-Speed Capability: The phenolic cage material offers excellent strength-to-weight ratio and thermal stability, contributing to the bearing's limiting speed of 36,000 rpm. The cage design minimizes friction and allows efficient lubrication distribution.
Universal Matching Design: As a Universal Matchable (SU) bearing, the 71813 CDGA/P4 can be precisely paired with other identical bearings to create optimized bearing sets with controlled preload, enhancing system rigidity and accuracy.
Premium Material Selection: 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.
71813 CDGA/P4 Bearing Typical Application Areas
- Machine Tool Spindles: High-speed machining centers, grinding spindles, and precision lathes requiring P4 accuracy
- Precision Instrumentation: Measuring equipment, optical instruments, and laboratory apparatus
- High-Speed Motors: Servo motors, spindle motors, and other high-RPM electric drives
- Aerospace Components: Guidance systems, actuator mechanisms, and auxiliary power units
- Medical Equipment: Dental handpieces, surgical tools, and diagnostic imaging systems
- Robotics: Precision joints, rotary actuators, and automated assembly systems
