71936 ACD/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 71936 ACD/HCP4A is a single-row angular contact ball bearing engineered for applications demanding exceptional precision and performance. This precision bearing is distinguished by its ceramic ball construction and P4 (ABEC-7) tolerance class, ensuring superior running accuracy and rotational stability. Its primary advantage lies in its ability to accommodate high combined loads, efficiently handling both radial and significant axial loads in one direction due to its specific contact angle of 25°. Preloaded and pre-lubricated, it is designed for high-speed operation and offers outstanding rigidity, making it an ideal choice for high-reliability, high-precision machinery.
71936 ACD/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning |
|---|---|
| ACD | Indicates a 25° contact angle and that the bearing is designed for optimized axial load capacity. |
| HC | Signifies the use of Hybrid Ceramic balls (Silicon Nitride), which reduce friction, heat generation, and wear, enabling higher speeds. |
| P4A | Denotes a P4 tolerance class (equivalent to ABEC-7) with additional accuracy requirements on running accuracy for the shaft and housing seatings. |
Structural Features and Performance Benefits
- Hybrid Ceramic Construction: The combination of chrome steel rings and ceramic balls significantly reduces centrifugal forces, lowers operating temperature, and extends service life, especially in high-speed applications.
- High Rigidity and Load Capacity: The defined 25° contact angle and preload provide high system rigidity, enabling the bearing to withstand substantial combined loads with minimal deflection.
- Optimized High-Speed Performance: The lightweight phenolic cage and low-friction ceramic balls contribute to a high limiting speed of 8,500 rpm, making it a true high-speed bearing.
- Precision and Reliability: Manufactured to P4 tolerance class, this bearing ensures exceptional running accuracy and smooth operation, which is critical for precision spindles and machinery.
- Wide Temperature Range: Suitable for operation within a temperature range of -30°C to 110°C, accommodating various industrial environments.
71936 ACD/HCP4A Bearing Typical Application Areas
- Machine Tool Spindles: High-speed machining centers, grinding spindles, and milling spindles.
- Precision Instrumentation: High-speed measuring devices and analytical equipment.
- Turbochargers and other high-speed rotating assemblies.
- Advanced Robotics and automation systems requiring high positional accuracy.
