S71901 CD/P4A
Sealed Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
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S71901 CD/P4A Bearing Product Overview & Core Advantages
The S71901 CD/P4A is a super-precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and high-speed performance. As a single-row bearing, it is optimized to support combined loads, primarily handling high radial loads and axial loads in one direction. Its defining characteristics include a P4 (ABEC-7) tolerance class for minimal runout, a 15° contact angle for optimal axial load capacity, and a phenolic resin cage enabling smooth operation at high speeds. This bearing is preloaded and pre-lubricated, making it an ideal, ready-to-install solution for high-rigidity spindles and other precision machinery.
S71901 CD/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| S7 | Indicates a series of high-precision, high-speed angular contact ball bearings. |
| 1901 | Specifies the bearing size: 12 mm bore, 24 mm OD, 6 mm width. |
| CD | Signifies a specific contact angle (15°) and internal design optimized for high rigidity and speed. |
| P4A | Denotes the tolerance class P4 (ABEC-7), ensuring ultra-precise dimensional and running accuracy. |
S71901 CD/P4A Bearing Structural Features & Performance Benefits
- High Rigidity and Precision: Manufactured to P4 tolerance class with a phenolic cage, this bearing provides exceptional dimensional stability and minimizes vibration, which is critical for maintaining machining accuracy.
- Optimized Load Capacity: The 15° contact angle and high-grade chrome steel construction enable it to handle significant combined radial and axial loads efficiently.
- Superior High-Speed Performance: The lightweight phenolic cage reduces centrifugal forces, and the optimized internal geometry allows for a high limiting speed of 70,000 rpm, making it a true high-speed bearing.
- Pre-Lubricated and Sealed: The bearing comes sealed and lubricated, protecting against contamination and providing long-term, maintenance-free operation within its specified temperature range.
S71901 CD/P4A Bearing Typical Application Areas
The S71901 CD/P4A is engineered for high-performance applications where precision and speed are paramount. Its primary uses include:
- High-Frequency Spindles for PCB drilling and precision milling
- Precision Grinding Spindles
- High-speed rotors in Dental Handpieces and medical equipment
- Axles and mandrels in Textile Machinery
- High-speed Encoders and measuring instruments
