7212 CDGA/HCP4A
Hybrid Ceramic Super Precision Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
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7212 CDGA/HCP4A Bearing Product Overview & Core Advantages
The 7212 CDGA/HCP4A is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and performance. Engineered with ceramic balls and manufactured to P4A tolerance class, this bearing delivers superior speed capabilities, reduced friction, and extended service life. Its 15° contact angle is optimized for handling combined loads, making it an ideal solution for high-rigidity, high-speed spindle systems where reliability is critical.
7212 CDGA/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| 7212 | Basic designation: 60mm bore, 110mm OD, 22mm width |
| CD | 15° contact angle design |
| GA | Universal Matchable (SU) bearing in a set of 3 |
| HC | Hybrid ceramic balls (silicon nitride) |
| P4A | High precision tolerance class (superior to ABEC 7) |
7212 CDGA/HCP4A Bearing Structural Features & Performance Benefits
Hybrid Ceramic Construction: The combination of chrome steel rings and ceramic balls significantly reduces friction, heat generation, and wear, enabling higher limiting speeds (32,500 rpm) and extended service life.
Precision Engineering: Manufactured to P4A tolerance class with tight dimensional control (bore/OD tolerance: -0.004mm to 0), ensuring consistent performance and precise running accuracy.
Optimized Load Capacity: The 15° contact angle and 16 ceramic balls provide excellent capability to handle combined radial and axial loads, with dynamic load rating of 12,870 lbf and static load rating of 10,462 lbf.
High-Speed Performance: The phenolic cage and hybrid construction contribute to reduced centrifugal forces and lower operating temperatures, making it ideal for high-speed applications.
Universal Matching: Designed as part of a universally matchable set of 3 bearings, allowing for flexible mounting arrangements and simplified inventory management.
7212 CDGA/HCP4A Bearing Typical Application Areas
The 7212 CDGA/HCP4A is specifically engineered for high-performance applications including:
- Machine Tool Spindles: High-speed machining centers, grinding spindles
- Precision Medical Equipment: Dental handpieces, surgical tools
- Aerospace Systems: Gyroscopes, navigation instruments
- High-Speed Motors: CNC spindle motors, high-frequency generators
- Semiconductor Manufacturing: Wafer handling robots, precision positioning stages
