71934 CDGA/HCP4A
Hybrid Ceramic Super Precision Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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Product Overview and Core Advantages
The 71934 CDGA/HCP4A is a single-row angular contact ball bearing designed for ultra-precision applications requiring exceptional rotational accuracy and stability. Operating under P4A super-precision tolerance class, this bearing delivers superior runout control and positional accuracy. Its ceramic ball construction enables higher speed capability and reduced thermal expansion compared to all-steel designs, while the phenolic cage provides excellent high-speed stability and reduced friction. The bearing comes pre-lubricated and is universal matchable, allowing for flexible mounting configurations in precision spindle arrangements.
71934 CDGA/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning | Performance Benefit |
|---|---|---|
| CDGA | 15° contact angle with extra light preload (Class A) | Optimized for high-speed operation with minimal friction and heat generation |
| HCP4A | Hybrid ceramic balls with P4A super precision tolerance | Enhanced speed capability, reduced weight, and superior running accuracy |
Structural Features and Performance Benefits
Hybrid Ceramic Construction: The combination of chrome steel rings and ceramic balls (Si3N4) significantly reduces centrifugal forces, enabling higher limiting speeds (16,250 rpm) while maintaining dimensional stability across the operating temperature range (-30°C to 110°C).
Precision Engineering: Manufactured to P4A tolerance class with tight dimensional control (bore and OD tolerance: -0.004mm to 0), ensuring exceptional running accuracy and minimal vibration in high-speed applications.
Optimized Load Capacity: With a 15° contact angle and 29 ceramic balls, this bearing delivers balanced performance for combined radial and axial loads, featuring a dynamic load rating of 29,925 lbf and static load rating of 37,350 lbf.
High-Speed Phenolic Cage: The phenolic resin cage provides excellent dimensional stability at high speeds, reduced friction, and compatibility with various lubrication systems.
71934 CDGA/HCP4A Bearing Typical Application Areas
- Machine Tool Spindles: High-speed milling, grinding, and turning centers requiring P4A precision
- Precision Medical Equipment: Dental handpieces, surgical tools, and diagnostic imaging systems
- Aerospace Systems: Gyroscopes, navigation instruments, and auxiliary power units
- Semiconductor Manufacturing: Wafer handling robots, precision positioning stages, and inspection equipment
- High-Speed Motors: CNC spindle drives, turbochargers, and precision servo systems
