71944 CD/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
71944 CD/HCP4A Bearing Product Overview & Core Advantages
The 71944 CD/HCP4A is a single-row angular contact ball bearing engineered for high-precision and high-speed applications. Its defining feature is the ability to support combined loads, handling significant radial loads and axial loads in one direction simultaneously. Manufactured to P4 (ABEC-7) tolerance class, it guarantees exceptional running accuracy. The use of a phenolic cage and ceramic balls contributes to lower friction, higher limiting speeds, and superior performance in demanding conditions. This bearing is preloaded and comes pre-lubricated, making it a compact and reliable solution for high-rigidity spindle arrangements.
71944 CD/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71944 | Basic bearing series and size designation (220mm bore, 300mm OD, 38mm width). |
| C | Specifies a 15° contact angle, optimized for high-speed operation and axial load capacity. |
| D | Indicates the bearing is supplied with a preload for enhanced rigidity and precise shaft positioning. |
| HC | Signifies the use of Hybrid Ceramic components (ceramic balls with steel rings), reducing weight and friction for higher speeds. |
| P4A | Denotes a P4 tolerance class with specific accuracy requirements for both inner and outer rings, equivalent to ABEC-7. |
71944 CD/HCP4A Bearing Structural Features & Performance Benefits
- High Rigidity and Precision: The single-row angular contact design with an applied preload eliminates internal clearance, resulting in extremely high system rigidity and minimal runout, which is critical for machining accuracy.
- Superior High-Speed Capability: The combination of a lightweight phenolic cage and low-density ceramic balls significantly reduces centrifugal forces, allowing the bearing to achieve a high limiting speed of 7,500 rpm.
- Exceptional Load Capacity: With a 15° contact angle and optimized internal geometry, this bearing offers an excellent dynamic load rating of 49,725 lbf and a static load rating of 67,500 lbf, reliably handling combined radial and axial loads.
- Reduced Friction and Long Life: Hybrid ceramic construction provides inherent lubricity, generates less heat, and extends lubricant life, contributing to longer service intervals and improved reliability.
71944 CD/HCP4A Bearing Typical Application Areas
This precision angular contact bearing is ideally suited for high-performance machinery requiring high speed, rigidity, and accuracy. Key applications include:
- Machine Tool Spindles: High-speed machining centers, grinding spindles, and CNC lathes.
- High-Speed Motors and Turbines: Where minimal friction and high rotational accuracy are paramount.
- Precision Instrumentation: Medical devices, semiconductor manufacturing equipment, and optical scanners.
- Aerospace and Defense Systems: Gyroscopes, radar systems, and other critical rotating assemblies.
