7012 ACD/P4AQGB
7000 Series Super Precision Angular Contact Ball Bearings
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7012 ACD/P4AQGB Bearing Product Overview & Core Advantages
The 7012 ACD/P4AQGB is a precision angular contact ball bearing designed for applications requiring exceptional rotational accuracy and high rigidity. As a universal matchable (SU) bearing with P4A tolerance class, it enables precise preload control when mounted in sets. Its 25° contact angle and optimized internal geometry provide superior performance in handling combined radial and axial loads. The phenolic cage and high-grade chrome steel construction ensure reliable operation in demanding high-speed applications.
7012 ACD/P4AQGB Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7012 | Basic bearing designation (60mm bore, 95mm OD, 72mm width) |
| ACD | 25° contact angle, universal matchable design |
| P4A | High precision tolerance class (equivalent to ABEC 7) |
| QGB | Light preload (Class B) |
7012 ACD/P4AQGB Bearing Structural Features & Performance Benefits
High Precision Construction: Manufactured to P4A tolerance class with bore and outside diameter tolerances of -0.004mm to 0, ensuring exceptional running accuracy and minimal vibration.
Optimized Load Capacity: The 25° contact angle and carefully calculated internal geometry enable efficient handling of combined loads with radial dynamic load rating of 22,725 lbf and static rating of 29,700 lbf.
High-Speed Performance: The phenolic cage and optimized internal design contribute to a limiting speed of 39,000 rpm, making it suitable for demanding high-speed applications.
Universal Matching Capability: As an SU-type universal matchable bearing, it can be mounted in sets of four without selective matching, simplifying installation and ensuring consistent preload characteristics.
7012 ACD/P4AQGB Bearing Typical Application Areas
- Machine Tool Spindles - High-precision machining centers and grinding machines
- High-Speed Motors - Industrial motors and spindle drives requiring precision operation
- Precision Instrumentation - Measuring equipment and laboratory instruments
- Aerospace Components - Guidance systems and aircraft control mechanisms
- Medical Equipment - Dental handpieces and surgical tool drives
