S71909 CDGB/P4A
Sealed Super Precision Angular Contact Ball Bearings
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S71909 CDGB/P4A Bearing Product Overview & Core Advantages
The S71909 CDGB/P4A is a super-precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and high-speed performance. Engineered to a P4A tolerance class, this bearing excels in handling combined loads (radial and axial) simultaneously. Its compact design, featuring a 45 mm bore and 12 mm width, makes it ideal for space-constrained, high-reliability machinery. The light preload (Class B) ensures smooth operation with minimal deflection, while the phenolic cage and sealed construction contribute to its high-speed capability and operational longevity.
S71909 CDGB/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| S7 | Series designation for high-precision angular contact ball bearings |
| 1909 | Bore size code (45 mm) and series identifier |
| C | 15° contact angle design |
| D | High-precision phenolic (phenolic resin) cage |
| GB | Universal Matchable (SU) designation for pre-loaded bearing sets |
| P4A | Super-precision tolerance class with enhanced running accuracy |
S71909 CDGB/P4A Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The optimized internal geometry with a 15° contact angle provides excellent stability and resistance to deflection under combined loads. With a dynamic load rating of 2925 lbf and static load rating of 2138 lbf, it delivers reliable performance in demanding applications.
High-Speed Performance: The lightweight phenolic cage and precision-ground chrome steel components enable a limiting speed of 46,000 rpm. This makes it suitable for high-speed spindles and other rapid-rotation applications.
Precision Engineering: Manufactured to P4A tolerance class with tight dimensional tolerances (bore: -0.004mm to 0), this bearing ensures minimal runout and vibration for superior rotational accuracy.
Matched Set Capability: As a Universal Matchable (SU) bearing, it can be supplied in pre-loaded sets (typically 3 bearings) for optimal stiffness and performance in multi-bearing arrangements.
S71909 CDGB/P4A Bearing Typical Application Areas
The S71909 CDGB/P4A is ideally suited for high-precision, high-speed applications including:
- Machine Tool Spindles - CNC machining centers, grinding spindles
- Precision Instrumentation - Measuring equipment, optical devices
- High-Speed Motors - Industrial servo motors, spindle motors
- Aerospace Components - Gyroscopes, navigation systems
- Medical Equipment - Dental handpieces, laboratory instrumentation
