71944 CDGA/HCP4A
Hybrid Ceramic Super Precision Bearings
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71944 CDGA/HCP4A Bearing Product Overview & Core Advantages
The 71944 CDGA/HCP4A is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and performance. Engineered to accommodate combined loads (radial and axial) simultaneously, this bearing features a 15° contact angle optimized for high-speed operation. Its P4A tolerance class ensures ultra-precise running accuracy, while the ceramic ball construction provides superior performance in high-speed and temperature-variable environments. This bearing is pre-lubricated and comes as part of a universally matchable set, enabling simplified installation and optimal preload configuration in multi-bearing arrangements.
71944 CDGA/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Performance Benefit |
|---|---|---|
| 71944 | Basic bearing designation (220mm bore, 300mm OD) | Standardized sizing for compatibility |
| C | 15° contact angle | Optimized for high-speed applications |
| DG | Universal matching bearing | Interchangeable mounting in any combination |
| A | Extra light preload | Minimal friction, ideal for high-speed operation |
| HCP4A | P4A tolerance class with phenolic cage | Ultra-precision performance with lightweight cage |
71944 CDGA/HCP4A Bearing Structural Features & Performance Benefits
Hybrid Ceramic Construction: The combination of chrome steel rings and ceramic balls (Si3N4) provides significant advantages including reduced centrifugal forces, lower operating temperatures, and extended service life at high speeds. The 25.4mm ball diameter and 29-ball configuration optimize load distribution.
Precision Engineering: Manufactured to P4A tolerance class with tight dimensional controls (bore/OD tolerance: -0.004mm to 0), this bearing ensures minimal runout and vibration for precision applications.
High-Speed Capability: The phenolic resin cage offers excellent strength-to-weight ratio and smooth operation at the limiting speed of 11,000 rpm. The 15° contact angle balances axial and radial load capacity while maintaining high-speed performance.
Superior Load Capacity: With dynamic load rating of 49,725 lbf and static load rating of 67,500 lbf, this bearing delivers reliable performance under demanding operating conditions.
71944 CDGA/HCP4A Bearing Typical Application Areas
- Machine Tool Spindles: High-precision machining centers and grinding spindles requiring exceptional running accuracy
- High-Speed Motors: Electric motors and generators operating at elevated speeds
- Aerospace Systems: Aircraft auxiliary power units and flight control systems
- Medical Equipment: High-speed dental handpieces and surgical tools
- Robotics: Precision robotic joints and automation equipment
- Semiconductor Manufacturing: Wafer handling equipment and precision positioning systems
