S7212 CDGB/P4A
Sealed Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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S7212 CDGB/P4A Bearing Product Overview & Core Advantages
The S7212 CDGB/P4A is a single-row angular contact ball bearing engineered for high-precision applications requiring exceptional rotational accuracy and rigidity. Operating under P4A super-precision tolerance, this bearing delivers superior running accuracy essential for demanding machinery. Its 15° contact angle and light preload (Class B) configuration are optimized to handle significant combined loads—both radial and axial—while maintaining high-speed capabilities up to 32,500 rpm. The Universal Matchable (SU) design allows for precise paired mounting, ensuring optimal performance in high-rigidity spindle arrangements.
S7212 CDGB/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Performance Benefit |
|---|---|---|
| S7 | High-speed series designation | Optimized for high-speed operation up to 32,500 rpm |
| 212 | Standard dimension series (60mm bore × 110mm OD × 22mm width) | Compact design with standardized bearing dimensions |
| CD | 15° contact angle with optimized internal geometry | Enhanced combined load capacity and stiffness |
| GB | Grease lubrication with sealed construction | Extended service life with maintenance-free operation |
| P4A | Super precision tolerance class | Exceptional running accuracy for precision bearing applications |
S7212 CDGB/P4A Bearing Structural Features & Performance Benefits
High-Precision Construction: Manufactured to P4A tolerance class with bore and outside diameter tolerances of -0.004mm to 0, ensuring exceptional dimensional stability and running accuracy.
Advanced Material Selection: Features chrome steel rings and balls combined with a phenolic resin cage that provides excellent strength-to-weight ratio, reduced friction, and superior performance at high speeds.
Optimized Load Capacity: The 15° contact angle design enables efficient handling of 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 precision-ground components allow for limiting speeds of 32,500 rpm, making it ideal for high-speed spindle applications.
Universal Matching Capability: Designed as Universal Matchable (SU) bearings, they can be precisely paired in sets of 2 to create preloaded arrangements that deliver enhanced system rigidity and accuracy.
S7212 CDGB/P4A Bearing Typical Application Areas
- Machine Tool Spindles: High-speed machining centers, grinding spindles, and precision lathes requiring super-precision bearings
- Precision Instrumentation: Measuring equipment, optical instruments, and laboratory apparatus demanding exceptional running accuracy
- High-Speed Motors: Spindle motors, high-frequency generators, and precision drive systems
- Aerospace Components: Gyroscopes, navigation systems, and aircraft instrumentation requiring reliable angular contact ball bearings
- Medical Equipment: Dental handpieces, surgical tools, and diagnostic imaging systems where precision and reliability are critical
