7012 ACD/HCP4AQBCA
Hybrid Ceramic Super Precision Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
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Materials
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7012 ACD/HCP4AQBCA Bearing Product Overview & Core Advantages
The 7012 ACD/HCP4AQBCA is a high-precision quadruplex angular contact ball bearing designed for demanding applications requiring exceptional rigidity and accuracy. This matched set features four bearings arranged in a back-to-back (QBC) configuration, providing superior stability and moment load capacity. Engineered with a 25° contact angle and an Extra Light (Class A) preload, it is optimized for high-speed operation while maintaining precise rotational accuracy. The use of ceramic balls and a phenolic cage significantly reduces centrifugal forces, enabling higher limiting speeds and extended service life. This bearing is pre-lubricated and capable of handling combined radial and axial loads simultaneously, making it an ideal solution for ultra-precision machinery.
7012 ACD/HCP4AQBCA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Performance Implication |
|---|---|---|
| 7012 | Standard bore diameter (60mm) and series designation | Defines basic dimensions and load capacity |
| ACD | Angular Contact Design, 25° contact angle | Optimized for combined radial and axial loads |
| HC | Hybrid Ceramic (Silicon Nitride balls) | Reduced weight, lower friction, higher speed capability |
| P4A | High Precision Tolerance Class | Exceptional running accuracy and dimensional stability |
| QBC | Quadruplex Back-to-Back arrangement | Maximum rigidity and moment load resistance |
7012 ACD/HCP4AQBCA Bearing Structural Features & Performance Benefits
Exceptional Rigidity: The quadruplex back-to-back arrangement creates an extremely rigid bearing system that minimizes deflection under heavy combined loads, ensuring precise positioning and reduced vibration.
High-Speed Capability: The combination of ceramic balls (40% lighter than steel) and a phenolic resin cage reduces centrifugal forces and friction, enabling operation at limiting speeds up to 39,000 rpm. The optimized internal geometry further enhances high-speed performance.
Precision Performance: Manufactured to P4A tolerance class with tight dimensional controls (bore/OD tolerance: -0.004mm to 0), this bearing delivers exceptional running accuracy and minimal rotational error.
Optimized Preload: The Extra Light (Class A) preload ensures minimal starting torque while maintaining sufficient internal clearance control for precision applications requiring high positional accuracy.
Superior Load Capacity: With a dynamic load rating of 22,725 lbf and static load rating of 29,700 lbf, this bearing can handle significant radial and axial loads simultaneously while maintaining performance integrity.
7012 ACD/HCP4AQBCA Bearing Typical Application Areas
High-Speed Machine Tool Spindles: CNC machining centers, grinding spindles, and milling applications requiring extreme precision and rigidity
Precision Robotics: Articulated robot arms, CNC rotary tables, and automated positioning systems demanding high accuracy and moment load capacity
Aerospace Components: Gyroscopes, navigation systems, and aircraft control surface actuators requiring reliable high-speed operation
Medical Equipment: High-speed dental handpieces, surgical drill systems, and laboratory automation equipment
Semiconductor Manufacturing: Wafer handling robots, precision positioning stages, and inspection equipment requiring sub-micron accuracy
