S71904 ACDGC/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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S71904 ACDGC/P4A Bearing Product Overview & Core Advantages
The S71904 ACDGC/P4A is a super-precision angular contact ball bearing designed for applications demanding exceptional accuracy and reliability. This sealed bearing features a phenolic cage and is preloaded to Moderate (Class C) standards, ensuring high system rigidity and minimal runout. Its primary advantage lies in its ability to handle combined loads (radial and axial) simultaneously with high precision, making it ideal for high-speed spindles and other precision machinery. The bearing is part of a universal matchable (SU) set, allowing for flexible mounting configurations in pairs to support bidirectional axial loads.
Model Code Breakdown
| 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. |
| ACD | Contact angle of 25°, optimized for axial load capacity. |
| GC | Internal clearance/preload group, indicating Moderate preload (Class C). |
| P4A | High tolerance class (geometric accuracy equivalent to ABEC 7), ensuring superior running precision. |
S71904 ACDGC/P4A Bearing Structural Features & Performance Benefits
- High Rigidity and Stability: The phenolic cage and moderate preload contribute to exceptional dimensional stability and damping characteristics, reducing vibration and enabling smooth operation at high speeds.
- Superior Load Capacity: With a 25° contact angle and robust construction, this bearing is engineered to support significant combined radial and axial loads.
- Optimized High-Speed Performance: The lightweight phenolic cage and precision-ground components allow for a high limiting speed of 75,000 rpm, making it a true high-speed bearing.
- Sealed and Pre-Lubricated for Long Life: The integral seals protect against contamination, and the bearing is pre-lubricated with grease, providing maintenance-free operation within a wide temperature range of -30°C to 110°C.
S71904 ACDGC/P4A Bearing Typical Application Areas
- Machine Tool Spindles
- High-Frequency Machining Centers
- Precision Grinding Spindles
- High-Speed Motors
- Medical and Dental Equipment
- Advanced Robotics and Automation
