S71912 ACB/HCP4AQGA
Hybrid Ceramic Super Precision Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
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S71912 ACB/HCP4AQGA Bearing Product Overview & Core Advantages
The S71912 ACB/HCP4AQGA is a precision angular contact ball bearing engineered for high-performance applications. As a universally matchable (SU) bearing supplied in a set of four, it is designed to accommodate combined loads—simultaneously handling significant radial loads and bidirectional axial loads. Its ceramic ball construction and P4A super-precision tolerance class deliver exceptional rotational accuracy, high rigidity, and superior high-speed performance, making it an ideal choice for demanding, high-reliability systems.
S71912 ACB/HCP4AQGA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| S71912 | Denotes the bearing series and size (60mm bore, 85mm OD, 52mm width). |
| ACB | Indicates a 25° contact angle and specific internal design optimized for high rigidity and speed. |
| HCP4A | Signifies a P4A tolerance class (higher than ABEC 7/ISO P4) and a phenolic (phenolic) cage. |
| QGA | Specifies the universal matchable (SU) arrangement and an extra light (A) preload. |
S71912 ACB/HCP4AQGA Bearing Structural Features & Performance Benefits
High Rigidity and Load Capacity: The bearing's angular contact design and 25° contact angle provide high rigidity, enabling it to support substantial combined radial and axial loads in both directions.
Superior High-Speed Performance: The combination of ceramic balls (lower density reducing centrifugal forces) and a lightweight phenolic cage allows for a very high limiting speed of 36,000 rpm, minimizing friction and heat generation.
Precision and Longevity: Manufactured to P4A super-precision standards with tight bearing dimensions and tolerances, it ensures smooth, quiet, and accurate operation. The sealed design and pre-applied grease lubrication offer protection from contamination and contribute to a long, maintenance-free service life within a temperature range of -30°C to 110°C.
S71912 ACB/HCP4AQGA Bearing Typical Application Areas
This high-grade precision bearing is ideally suited for applications requiring extreme accuracy, high speeds, and reliable performance, including:
- Machine Tool Spindles
- High-Frequency Machining Centers
- Precision Grinding Spindles
- High-Speed Motors and Pumps
- Aerospace and Defense Systems
