S71905 CEGC/P4A
Sealed Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
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Materials
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S71905 CEGC/P4A Bearing Product Overview & Core Advantages
The S71905 CEGC/P4A is a super-precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and high-speed performance. As a single bearing that is Universal Matchable (SU), it can be paired with an identical bearing to form a precisely preloaded set, offering superior stiffness and runout control. Its moderate preload (Class C) and P4A tolerance class ensure smooth, quiet operation under combined loads, making it an ideal choice for high-reliability, high-precision spindles and machinery.
Model Code In-Depth Explanation
| Code Segment | Technical Meaning |
|---|---|
| S | Super-precision bearing |
| 7 | Angular contact ball bearing |
| 1905 | Bore: 25 mm, Outside Diameter: 42 mm, Width: 9 mm |
| C | 15° contact angle |
| E | Optimized internal design |
| GC | Moderate preload group |
| P4A | High tolerance class for precision applications |
S71905 CEGC/P4A Bearing Structural Features & Performance Benefits
- High Rigidity and Load Capacity: The optimized internal geometry, including a 15° contact angle and chrome steel balls, provides excellent resistance to combined loads (radial and axial).
- Superior High-Speed Performance: The lightweight phenolic cage minimizes centrifugal forces, contributing to a high limiting speed of 83,000 rpm. The grease lubrication is formulated for stable operation at these speeds.
- Exceptional Precision and Smoothness: Manufactured to P4A tolerance standards with a moderate preload, this bearing ensures minimal runout and vibration for ultra-smooth rotation in precision machinery.
- Sealed and Lubricated for Life: The bearing is sealed and pre-lubricated with high-performance grease, offering protection from contamination and long-term, maintenance-free operation within a temperature range of -30°C to 110°C.
S71905 CEGC/P4A Bearing Typical Application Areas
The S71905 CEGC/P4A is engineered for high-performance applications where precision and speed are critical. Key industries and equipment include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Instruments: Measuring devices, optical scanners, and coordinate measuring machines (CMM).
- High-Frequency Motors and Spindles: PCB drilling spindles and dental handpieces.
- Robotics: High-accuracy joints and actuators.
