S71902 CDGB/P4A
Sealed Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
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S71902 CDGB/P4A Bearing Product Overview & Core Advantages
The S71902 CDGB/P4A is a metric precision angular contact ball bearing designed for applications demanding exceptional accuracy and high-speed performance. Engineered to a P4A tolerance class, it offers superior dimensional stability and running accuracy. Its primary advantage lies in its ability to accommodate combined loads—simultaneously handling radial loads and axial loads in one direction—making it ideal for high-precision spindles and other critical machinery. The phenolic cage and light preload (Class B) contribute to smooth operation at high rotational speeds, while the sealed design ensures long-term reliability.
S71902 CDGB/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| S7 | Series designation for high-precision angular contact ball bearings |
| 1902 | Bore size 15 mm, outside diameter 28 mm, width 7 mm |
| C | 15° contact angle, optimized for high-speed applications |
| DG | Universal Matchable (SU) design; two bearings can be universally paired |
| B | Light preload (Class B) for reduced noise and vibration |
| P4A | High precision tolerance class exceeding ABEC 7 standards |
S71902 CDGB/P4A Bearing Structural Features & Performance Benefits
High-Speed Capability: The phenolic resin cage and 15° contact angle are optimized for high-speed operation, enabling a limiting speed of 115,000 rpm. This makes it suitable for demanding spindle applications.
Precision & Rigidity: Manufactured to P4A tolerance class with tight dimensional controls on the bearing bore, outside diameter, and width, this bearing provides exceptional running accuracy and system rigidity.
Sealed & Lubricated for Life: The sealed design with factory-applied grease lubrication protects against contamination and ensures consistent performance across a temperature range of -30°C to 110°C, offering a maintenance-free solution.
Universal Matching: Designated as Universal Matchable (SU), these bearings can be universally paired in sets of two without selective matching, simplifying installation and ensuring optimal preload and performance.
S71902 CDGB/P4A Bearing Typical Application Areas
The S71902 CDGB/P4A is engineered for high-performance applications where precision and speed are critical. Its primary uses include:
- Machine Tool Spindles
- High-Frequency Motors
- Precision Grinding Equipment
- Dental and Medical Handpieces
- Aerospace Instrumentation
