71932 CD/HCP4A
Hybrid Ceramic Super Precision Bearings
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71932 CD/HCP4A Bearing Product Overview & Core Advantages
The 71932 CD/HCP4A is a single-row angular contact ball bearing engineered for applications demanding exceptional precision and high-speed performance. Manufactured to P4 (ABEC-7) tolerance class, this bearing is designed to accommodate high combined loads, primarily thrust loads in one direction, while also supporting significant radial loads. Its core advantages stem from a combination of a phenolic resin cage, ceramic balls, and a 15° contact angle, which collectively enable superior high-speed capability and operational stability. The bearing is pre-lubricated and available with a preload, ensuring immediate high-rigidity performance and reduced vibration in demanding machinery.
71932 CD/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71932 | Basic bearing series and size designation (160mm bore, 220mm OD, 28mm width). |
| C | Designates a 15° contact angle, optimized for high-speed applications. |
| D | Indicates a high-precision phenolic resin cage for reduced weight and superior high-speed performance. |
| HC | Signifies the use of Hybrid Ceramic balls (ceramic balls with steel rings), offering higher speed limits and reduced heat generation. |
| P4 | Denotes the P4 (ABEC-7) tolerance class, ensuring extremely tight dimensional and running accuracy for precision applications. |
| A | Specifies that the bearing is supplied with a preload for enhanced rigidity and precise rotational accuracy. |
71932 CD/HCP4A Bearing Structural Features & Performance Benefits
- Hybrid Ceramic Construction: The combination of chrome steel rings and silicon nitride (Si3N4) ceramic balls significantly reduces centrifugal forces, friction, and operating temperature. This results in a dramatically higher limiting speed (11,000 rpm) and extended service life compared to all-steel bearings.
- Phenolic Resin Cage: The lightweight and robust phenolic cage provides excellent dimensional stability and guidance at high speeds, contributing to smooth operation and reduced vibration.
- High Load Capacity: With a dynamic load rating of 29,250 lbf and a static load rating of 36,000 lbf, this bearing is built to handle significant combined radial and axial loads.
- Precision & Rigidity: The P4 tolerance class and available preload ensure minimal runout and high system rigidity, which is critical for maintaining accuracy in high-speed spindles.
- Wide Temperature Range: Suitable for operation in a temperature range from -30°C to 110°C, accommodating various industrial environments.
71932 CD/HCP4A Bearing Typical Application Areas
The 71932 CD/HCP4A is ideally suited for high-performance machinery where high speed, precision, and rigidity are paramount. Key application areas include:
- Machine Tool Spindles: High-speed CNC machining centers, grinding spindles, and milling spindles.
- Precision Robotics: High-accuracy robotic arms and joints requiring minimal deflection.
- Aerospace & Defense Systems: Gyroscopes, radar systems, and other precision instruments.
- High-Speed Motors and Drives: Electric motors and frequency-controlled drives operating at extreme rotational speeds.
