71904 CEGA/HCP4A
Hybrid Ceramic Super Precision Bearings
Image may differ from product. See technical specification for details.
Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
- Fast delivery
- Free shipping on orders over $200
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
71904 CEGA/HCP4A Bearing Product Overview & Core Advantages
The 71904 CEGA/HCP4A is a high-precision angular contact ball bearing designed for applications demanding exceptional accuracy and speed. Engineered with a 15° contact angle and manufactured to P4A tolerance class, this bearing delivers superior rotational precision and dimensional stability. Its ceramic ball construction and phenolic cage enable outstanding high-speed performance while maintaining minimal thermal expansion. The bearing comes prelubricated and is universally matchable (SU), allowing for precise axial preload control when paired with identical bearings.
71904 CEGA/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71904 | Basic bearing designation (20mm bore, 37mm OD, 9mm width) |
| CE | 15° contact angle design |
| GA | Light preload classification |
| HCP4A | Enhanced P4A precision class with phenolic cage |
71904 CEGA/HCP4A Bearing Structural Features & Performance Benefits
Advanced Material Composition: The combination of chrome steel rings and ceramic balls (Si3N4) provides exceptional wear resistance and enables operation at higher speeds with reduced heat generation compared to all-steel designs.
Precision Engineering: Manufactured to ABEC 7/P4A tolerance standards, this bearing ensures minimal runout and vibration, making it ideal for high-precision applications. The phenolic resin cage offers excellent dimensional stability and reduced weight, contributing to higher limiting speeds.
Optimized Load Capacity: With a 15° contact angle, the 71904 CEGA/HCP4A efficiently handles combined radial and axial loads. The dynamic load rating of 1112 lbf and static load rating of 531 lbf ensure reliable performance under demanding conditions.
Thermal Performance: The ceramic balls provide superior thermal stability, reducing thermal expansion effects and maintaining precision across the operating temperature range of -30°C to 110°C.
71904 CEGA/HCP4A Bearing Typical Application Areas
- Machine Tool Spindles: High-speed machining centers and precision grinding spindles
- Medical Equipment: Dental handpieces, surgical tools, and diagnostic imaging systems
- Aerospace Systems: Gyroscopes, navigation instruments, and auxiliary power units
- Semiconductor Manufacturing: Wafer handling robots and precision positioning stages
- High-Speed Motors: Servo motors, spindle motors, and high-frequency applications
- Test & Measurement Equipment: Coordinate measuring machines and optical inspection systems
