71920 ACD/HCP4ADGC
Hybrid Ceramic Super Precision Bearings
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71920 ACD/HCP4ADGC Bearing Product Overview & Core Advantages
The 71920 ACD/HCP4ADGC is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and performance. As a universally matchable (SU) bearing supplied in a pre-set pair, it delivers superior rigidity and can accommodate combined loads (radial and axial) simultaneously. Its ceramic balls and P4A tolerance class ensure high-speed capability and precise rotational accuracy, making it ideal for high-reliability machinery where minimal runout and thermal stability are critical.
71920 ACD/HCP4ADGC Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71920 | Basic bearing series and size designation (100mm bore, 140mm OD, 40mm width) |
| AC | Angular Contact design with a 25° contact angle |
| D | High load capacity internal design |
| HC | Hybrid Ceramic balls (ceramic balls with steel rings) |
| P4A | High-precision tolerance class (exceeds ABEC 7/ISO P4) |
| DGC | Universal Matchable (SU) arrangement, supplied as a pre-loaded pair |
71920 ACD/HCP4ADGC Bearing Structural Features & Performance Benefits
Hybrid Ceramic Construction: The combination of chrome steel rings and ceramic balls significantly reduces friction, minimizes heat generation, and extends service life, particularly in high-speed applications.
Precision Engineering: Manufactured to P4A tolerance class, this bearing ensures extremely tight dimensional accuracy and minimal rotational vibration, critical for precision machinery.
Optimized Load Capacity: The 25° contact angle and robust internal geometry provide excellent performance under combined radial and axial loads.
High-Speed Performance: The phenolic cage and hybrid ceramic design contribute to a high limiting speed of 15,000 rpm, reducing centrifugal forces and maintaining stability.
Universal Matching (SU): Supplied as a pre-set pair with moderate preload (Class C), these bearings are ready for installation, simplifying assembly and ensuring consistent, optimal performance.
71920 ACD/HCP4ADGC Bearing Typical Application Areas
- Machine Tool Spindles: High-speed machining centers, grinding spindles
- Precision Industrial Pumps: Chemical process pumps, high-pressure pumps
- Advanced Compressors: Air compressors, refrigeration compressors
- Robotics and Automation: Robot arm joints, precision positioning systems
- Aerospace Components: Guidance systems, auxiliary power units
- Medical Equipment: Dental handpieces, laboratory centrifuges
