7212 CD/HCP4ADGA
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
7212 CD/HCP4ADGA
Basic Information
System of measurement
Metric
Weight
1.39 kg
Tolerance class
P4A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
60 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
110 mm
Outside diameter tolerance
-0.004mm to 0
Width
44 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
14.288 mm
Ball quantity
16
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
21060 lbf
Radial static load rating
20925 lbf
Limiting speed
36 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Universal Matchable (SU)
Number of bearings in matched set
2
Universal matching bearing
Universal Matchable (SU)
Preload
Extra light / Class A
Materials
Ring material
Chrome Steel
Ball material
Ceramic
Cage material
Phenolic
Technical Drawings
No drawings available at the moment, will be launched soon
Price:
$ 374.81
/ each
In Stock
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7212 CD/HCP4ADGA Bearing Product Overview & Core Advantages
The 7212 CD/HCP4ADGA is a high-precision angular contact ball bearing engineered for demanding applications requiring exceptional accuracy and performance. This universal matchable (SU) bearing features a 15° contact angle and P4A tolerance class for superior running accuracy. Its core advantage lies in its ability to handle combined loads (radial and axial) simultaneously with high rigidity, making it ideal for high-speed spindle applications. The combination of ceramic balls and phenolic cage contributes to lower friction, higher limiting speeds, and extended service life.
7212 CD/HCP4ADGA Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning | Advantage |
|---|---|---|
| CD | High precision 15° contact angle design | Optimized for combined load capacity and high-speed operation |
| HC | Hybrid Ceramic (Silicon Nitride balls) | Reduced friction, higher speed capability, and longer life |
| P4A | ABEC 7 / ISO P4 precision class with specific running accuracy tolerances | Ensures minimal runout and vibration for ultra-precise applications |
| DGA | Universal Matchable (SU designation) in a pre-determined duplex pair | Simplifies mounting and provides pre-defined preload (Extra light / Class A) for optimal stiffness |
7212 CD/HCP4ADGA Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The duplex pair arrangement (2 bearings in a matched set) and 15° contact angle provide high rigidity, enabling the bearing to withstand significant combined radial and axial loads.
- Superior High-Speed Performance: The hybrid ceramic balls reduce centrifugal forces and friction, while the lightweight phenolic cage ensures stability. This combination allows for a high limiting speed of 36,000 rpm.
- Precision Engineering: Manufactured to P4A tolerance class with tight bore and OD tolerances, this bearing guarantees exceptional running accuracy and minimal vibration for sensitive machinery.
- Optimized for Matched Sets: The Universal Matchable (SU) design allows bearings to be mounted in pairs (back-to-back, face-to-face, or tandem) without selective assembly, ensuring consistent preload and performance.
7212 CD/HCP4ADGA Bearing Typical Application Areas
- Machine Tool Spindles: High-speed machining centers, grinding spindles, and CNC milling machines.
- Precision Instrumentation: Coordinate measuring machines (CMM) and optical positioning systems.
- High-Speed Motors and Drives: Servo motors, high-frequency spindles, and turbo-molecular pumps.
- Aerospace & Defense Systems: Gyroscopes, radar systems, and other critical rotating assemblies.
