S71903 CD/P4A
Sealed Super Precision Angular Contact Ball Bearings
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S71903 CD/P4A Bearing Product Overview & Core Advantages
The S71903 CD/P4A is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional rotational accuracy and rigidity. As a single-row bearing with a 15° contact angle, it is engineered to accommodate combined loads, efficiently handling significant radial loads and axial loads in one direction. Its P4 (ABEC-7) tolerance class ensures ultra-precise running accuracy, making it ideal for high-speed spindles and other precision machinery. The bearing comes preloaded and pre-lubricated, simplifying installation and delivering immediate, reliable performance.
S71903 CD/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| S7 | Series designation for high-precision angular contact ball bearings. |
| 1903 | Indicates the bearing size: 17mm bore, 30mm OD, 7mm width. |
| CD | Specifies a 15° contact angle and a matched preload. |
| P4A | Denotes the tolerance class P4 (ABEC-7), signifying very high running accuracy. |
S71903 CD/P4A Bearing Structural Features & Performance Benefits
High Rigidity and Load Capacity: The optimized 15° contact angle and robust construction provide high rigidity, enabling the bearing to support substantial combined radial and axial loads.
Superior High-Speed Performance: The lightweight phenolic resin cage minimizes centrifugal forces, contributing to a high limiting speed of 53,000 rpm. This makes it an excellent high-speed bearing for spindle applications.
Precision Engineering: Manufactured to P4 precision class with tight dimensional tolerances on the bore diameter, outside diameter, and width, ensuring smooth, quiet, and vibration-free operation.
Ready-to-Install: Supplied as a sealed and lubricated unit, the bearing is protected from contamination and is pre-configured for immediate use, reducing assembly time and ensuring long-term reliability.
S71903 CD/P4A Bearing Typical Application Areas
The S71903 CD/P4A is ideally suited for high-performance applications where precision and speed are critical. Key industries and equipment include:
- Machine Tool Spindles (High-speed milling, grinding)
- Precision Rotary Systems
- High-Frequency Motors
- Medical and Dental Equipment
- Optical and Measuring Instruments
