S71904 CDGC/P4A
Sealed Super Precision Angular Contact Ball Bearings
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S71904 CDGC/P4A Bearing Product Overview & Core Advantages
The S71904 CDGC/P4A is a super-precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and high-speed performance. As a single bearing with a 15° contact angle and Moderate (Class C) preload, it delivers superior axial rigidity and precise running accuracy. Its P4A tolerance class ensures extremely tight dimensional control, making it ideal for high-precision spindles and other critical machinery where minimal runout and vibration are paramount. The phenolic cage and grease lubrication contribute to its high-speed capabilities.
S71904 CDGC/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| S7 | Series designation for high-precision angular contact ball bearings |
| 1904 | Bore diameter: 20 mm, Outside diameter: 37 mm, Width: 9 mm |
| CD | Contact angle of 15° |
| GC | Moderate preload (Class C) |
| P4A | High-precision tolerance class, tighter than ABEC 7 |
S71904 CDGC/P4A Bearing Structural Features & Performance Benefits
High-Speed Performance: The phenolic resin cage offers excellent strength-to-weight ratio and low friction, enabling the bearing to achieve a high limiting speed of 75,000 rpm. Combined with optimized grease lubrication, it ensures stable operation at high rotational velocities.
High Rigidity & Accuracy: The 15° contact angle and moderate preload provide high axial rigidity, minimizing deflection under load. The P4A tolerance class guarantees extremely precise bearing dimensions and running accuracy, critical for applications requiring high positional repeatability.
Universal Matching Capability: Designated as Universal Matchable (SU), these bearings can be universally paired in any combination to form matched sets (typically sets of 2, 3, or 4 bearings) to achieve specific preload or rigidity requirements without selective assembly.
S71904 CDGC/P4A Bearing Typical Application Areas
The S71904 CDGC/P4A is ideally suited for high-performance applications, including:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Instrumentation: Measuring devices and optical scanners.
- High-Frequency Spindles: PCB drilling and routing machines.
- Robotics: High-accuracy joints and servo motors.
