71910 CB/HCP4A
Hybrid Ceramic Super Precision Bearings
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Main Dimensions
Ball & Washer Dimensions
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71910 CB/HCP4A Bearing Product Overview & Core Advantages
The 71910 CB/HCP4A is a single-row angular contact ball bearing engineered for high-precision applications requiring exceptional rotational accuracy and speed capability. Designed to accommodate combined loads (radial and axial) in one direction, this bearing features a 15° contact angle for optimal axial load capacity. Its P4 (ABEC-7) tolerance class ensures ultra-precise dimensional control, making it ideal for machine tool spindles and other high-performance machinery where minimal runout and vibration are critical. The phenolic cage and ceramic balls contribute to its high-speed performance and reduced weight.
71910 CB/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71910 | Basic bearing designation (50mm bore, 72mm OD, 12mm width) |
| CB | Specific internal design with optimized internal clearance and contact angle for preload applications |
| HC | Hybrid Ceramic: Features ceramic balls for reduced weight, higher stiffness, and superior high-speed performance |
| P4 | Precision tolerance class equivalent to ABEC-7, ensuring extremely tight dimensional accuracy |
| A | 30° contact angle variant (Note: specification shows 15°, this may indicate a special variant) |
71910 CB/HCP4A Bearing Structural Features & Performance Benefits
Hybrid Ceramic Construction: The combination of chrome steel rings and silicon nitride (Si3N4) ceramic balls provides significant advantages including reduced centrifugal forces, lower operating temperatures, and extended service life at high speeds. The ceramic balls also offer electrical insulation properties.
Phenolic Resin Cage: The lightweight phenolic cage ensures excellent dimensional stability and low friction at high rotational speeds, contributing to the bearing's limiting speed of 45,000 rpm.
Precision Engineering: Manufactured to P4 tolerance class with tight dimensional controls on bore, outside diameter, and width, this bearing delivers exceptional running accuracy and minimal vibration for precision applications.
Preload Capability: The CB design enables proper preload application, resulting in increased system stiffness, precise shaft positioning, and improved rotational accuracy.
71910 CB/HCP4A Bearing Typical Application Areas
- Machine Tool Spindles: High-speed machining centers, grinding spindles
- Precision Instrumentation: Measuring equipment, optical devices
- High-Speed Motors: CNC spindle motors, dental handpieces
- Aerospace Components: Gyroscopes, navigation systems
- Semiconductor Manufacturing: Wafer handling robots, precision positioning stages
