71912 ACB/HCP4ADGA
Hybrid Ceramic Super Precision Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
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71912 ACB/HCP4ADGA Bearing Product Overview & Core Advantages
The 71912 ACB/HCP4ADGA is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and speed. Engineered with a 25° contact angle and an Extra Light (A) preload, this bearing delivers superior rotational accuracy and rigidity. Its universal matchable (SU) design allows two bearings to be paired in a back-to-back or face-to-face arrangement to optimize performance under complex load conditions. The combination of a ceramic ball material and P4A super-precision tolerance makes it ideal for high-speed spindles and other precision machinery where minimal runout and thermal stability are critical.
71912 ACB/HCP4ADGA Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning |
|---|---|
| ACB | Angular Contact Bearing, 25° contact angle |
| HCP4A | High Precision (P4A tolerance class) with phenolic cage |
| DGA | Universal Matchable (SU) designation for paired mounting |
71912 ACB/HCP4ADGA Bearing Structural Features & Performance Benefits
High-Speed Capability: The phenolic resin cage and ceramic balls significantly reduce centrifugal forces and friction, enabling the bearing to achieve a limiting speed of 33,000 rpm. This makes it exceptionally suitable for high-frequency spindle applications.
Superior Rigidity & Load Capacity: The 25° contact angle and extra light preload provide excellent stiffness, enabling the bearing to handle combined loads (radial and axial) simultaneously with high precision. The universal matching capability further enhances system rigidity when bearings are mounted in pairs.
Precision Performance: Manufactured to P4A tolerance class with extremely tight dimensional tolerances on the bore, outside diameter, and width, this bearing ensures minimal vibration and superior running accuracy in precision equipment.
Advanced Material Technology: The use of silicon nitride ceramic balls provides advantages including reduced weight, lower thermal expansion, and electrical insulation, contributing to longer service life in high-speed and thermally challenging environments.
71912 ACB/HCP4ADGA Bearing Typical Application Areas
- Machine Tool Spindles: High-speed machining centers, grinding spindles
- Precision Instrumentation: Measuring equipment, optical scanners
- High-Speed Motors: CNC spindle motors, high-frequency electric motors
- Aerospace Components: Gyroscopes, navigation systems
- Medical Equipment: Dental handpieces, laboratory centrifuges
