7012 ACD/P4A
7000 Series Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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7012 ACD/P4A Bearing Product Overview & Core Advantages
The 7012 ACD/P4A is a single-row angular contact ball bearing engineered for applications demanding high precision and superior performance. Positioned in the P4 (ABEC-7) tolerance class, it is designed to accommodate high axial loads in one direction, making it ideal for high-speed spindles and precision machinery. Its key advantages include a high limiting speed of 20,000 rpm, a 25° contact angle for optimal load distribution, and a phenolic cage that ensures smooth operation at high velocities. This bearing is pre-lubricated for immediate use and offers exceptional rigidity and operational accuracy.
7012 ACD/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Suffix | Technical Meaning | Advantage |
|---|---|---|
| ACD | 25° Contact Angle Design | Optimized for high axial load capacity and high-speed operation. |
| P4A | P4 (ABEC-7) Tolerance Class, with specific running accuracy requirements. | Ensures extremely low vibration and noise, critical for high-precision applications. |
7012 ACD/P4A Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The single-row design with a 25° contact angle provides excellent rigidity and is capable of supporting high axial loads in one direction, as well as combined radial and axial loads.
- High-Speed Performance: The lightweight phenolic resin cage minimizes centrifugal forces, reduces friction, and contributes to the high limiting speed of 20,000 rpm.
- Precision Engineering: Manufactured to P4 tolerance class with tight dimensional tolerances on the bore diameter, outside diameter, and width, ensuring precise fit and minimal runout.
- Durability & Reliability: Constructed from chrome steel for both rings and balls, offering high fatigue resistance and long service life under demanding conditions.
7012 ACD/P4A Bearing Typical Application Areas
The 7012 ACD/P4A is ideally suited for high-performance applications where precision and speed are paramount. Key industries and equipment include:
- Machine Tool Spindles
- High-Speed Machining Centers
- Precision Grinding Spindles
- Industrial Pumps and Compressors
- Robotic Arm Joints and Precision Gearboxes
