7012 ACD/P4AQBCD
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/P4AQBCD Bearing Product Overview & Core Advantages
The 7012 ACD/P4AQBCD is a precision angular contact ball bearing designed for applications demanding exceptional rigidity and accuracy. This quadruplex back-to-back (QBC) matched set delivers superior performance under combined radial and axial loads. With a P4A tolerance class and heavy preload (Class D), it provides outstanding rotational accuracy and stiffness, making it ideal for high-precision machinery operating under demanding conditions.
7012 ACD/P4AQBCD Bearing Model Code Explained, Specifications & Naming Convention
| Suffix | Technical Meaning | Performance Benefit |
|---|---|---|
| ACD | Angular Contact Design with 25° contact angle | Optimized for combined loading conditions |
| P4A | High precision tolerance class | Superior running accuracy and minimal vibration |
| QBC | Quadruplex Back-to-Back arrangement | Maximum rigidity and moment load capacity |
| D | Heavy preload class | Enhanced stiffness and precise shaft positioning |
7012 ACD/P4AQBCD Bearing Structural Features & Performance Benefits
High Rigidity Design: The quadruplex back-to-back configuration creates an extremely rigid bearing system capable of withstanding heavy moment loads while maintaining precise alignment. This arrangement significantly enhances system stability under demanding operating conditions.
Superior Load Capacity: With a 25° contact angle and optimized internal geometry, this bearing efficiently handles combined radial and axial loads. The radial dynamic load rating of 22,725 lbf and static load rating of 29,700 lbf ensure reliable performance in heavy-duty applications.
Precision Performance: Manufactured to P4A tolerance standards with tight dimensional controls (bore and OD tolerance: -0.004mm to 0), this bearing delivers exceptional running accuracy. The phenolic cage provides excellent guidance and stability at high speeds, supporting operation up to 39,000 rpm.
Premium Material Construction: Manufactured from chrome steel for both rings and balls, this bearing offers superior wear resistance and fatigue life. The precision-ground components ensure smooth operation and long service life in precision applications.
7012 ACD/P4AQBCD Bearing Typical Application Areas
- Machine Tool Spindles: High-precision milling, grinding, and turning centers requiring extreme rigidity and accuracy
- Precision Gearboxes: Industrial transmission systems demanding high load capacity and minimal deflection
- Robotic Systems: High-accuracy robotic arms and automation equipment
- Aerospace Components: Critical rotating assemblies in aircraft systems
- Medical Equipment: High-speed medical imaging devices and surgical tools
- Test and Measurement Equipment: Precision instrumentation requiring minimal runout and vibration
