71920 ACD/HCP4ADGA
Hybrid Ceramic Super Precision Bearings
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71920 ACD/HCP4ADGA Bearing Product Overview & Core Advantages
The 71920 ACD/HCP4ADGA is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and performance. This universal matchable bearing is supplied as a pre-lubricated, pre-set pair (SU arrangement), enabling it to accommodate combined radial and axial loads simultaneously. Manufactured to a P4A tolerance class, it offers superior running accuracy and rotational precision. The combination of a chrome steel ring, ceramic balls, and a phenolic cage results in a bearing with high rigidity, extended service life, and suitability for high-speed operation, making it an ideal choice for high-reliability spindle systems.
Model Code In-Depth Analysis
| Suffix Code | Technical Meaning |
|---|---|
| ACD | Angular Contact Design with a 25° contact angle. |
| HC | Hybrid Ceramic, indicating the use of ceramic balls. |
| P4A | High-Precision Tolerance Class, superior to ABEC 7. |
| DGA | Universal Matchable (SU) arrangement, supplied as a pre-set pair. |
71920 ACD/HCP4ADGA Bearing Structural Features & Performance Benefits
- High Rigidity and Load Capacity: The angular contact design with a 25° contact angle and the use of a matched pair arrangement provide high rigidity, enabling the bearing to effectively support combined loads and moment loads.
- Superior High-Speed Performance: The lightweight phenolic cage and low-density ceramic balls reduce centrifugal forces, significantly contributing to the high limiting speed of 15,000 rpm. This makes it an excellent high-speed bearing.
- Extended Service Life and Reliability: Hybrid ceramic construction offers superior wear resistance, reduced operating temperature, and longer service life compared to all-steel bearings, especially in lubricant-starved conditions.
- Precision and Accuracy: Manufactured to a P4A tolerance class with tight dimensional tolerances on the bore diameter, outside diameter, and width, ensuring smooth, precise, and quiet operation.
71920 ACD/HCP4ADGA Bearing Typical Application Areas
- Machine Tool Spindles (High-speed milling, grinding, and turning centers)
- Precision Grinding Spindles
- High-Frequency Motors
- Aerospace and Defense Systems
- Medical and Dental Equipment
