7012 ACD/P4AQBCB
7000 Series Super Precision Angular Contact Ball Bearings
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7012 ACD/P4AQBCB Bearing Product Overview & Core Advantages
The 7012 ACD/P4AQBCB is a precision angular contact ball bearing designed for demanding applications requiring exceptional rigidity and accuracy. This quadruplex back-to-back (QBC) matched set delivers superior performance in handling combined loads (radial and axial) simultaneously. Manufactured to P4A tolerance class with a light preload (Class B), it ensures high running accuracy, reduced vibration, and optimal performance in high-speed and high-precision environments. Its matched set configuration provides exceptional system rigidity and rotational stability.
7012 ACD/P4AQBCB Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Significance |
|---|---|---|
| 7012 | Basic bearing series & size | Bore: 60mm, OD: 95mm, Width: 72mm |
| ACD | 25° Contact Angle Design | Optimized for axial load capacity and high-speed operation |
| P4A | High Precision Tolerance Class | Superior dimensional and running accuracy beyond ABEC 7 |
| QBC | Quadruplex Back-to-Back Arrangement | Four bearings matched for maximum rigidity and moment load capacity |
| Open | Seal Type | No seals/guards, allowing for custom lubrication systems |
7012 ACD/P4AQBCB Bearing Structural Features & Performance Benefits
Exceptional Rigidity & Load Capacity: The quadruplex back-to-back arrangement creates an extremely rigid bearing system capable of handling heavy combined loads and significant moment loads. The 25° contact angle provides optimal balance between radial and axial load capacity.
High-Speed Performance: Featuring a phenolic cage and precision-ground chrome steel components, this bearing achieves a limiting speed of 39,000 rpm. The light preload ensures minimal friction and heat generation at high rotational speeds.
Precision Engineering: Manufactured to P4A tolerance class with tight dimensional controls (bore/OD tolerance: -0.004mm to 0), this bearing delivers exceptional running accuracy and minimal vibration for precision applications.
Optimized Lubrication: Pre-lubricated for immediate operation, with a temperature range of -30°C to 110°C, ensuring reliable performance across various operating conditions.
7012 ACD/P4AQBCB Bearing Typical Application Areas
- Machine Tool Spindles: High-precision machining centers, grinding spindles, and milling applications
- High-Speed Spindles: CNC machining centers, precision grinding machines, and dental equipment
- Robotics & Automation: Precision robotic arms, rotary tables, and indexing mechanisms
- Aerospace & Defense: Gyroscopes, radar systems, and precision instrumentation
- Medical Equipment: High-speed dental handpieces, laboratory centrifuges, and imaging systems
