S71903 CD/P4ADGA
Sealed Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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S71903 CD/P4ADGA Bearing Product Overview & Core Advantages
The S71903 CD/P4ADGA is a super-precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and high-speed performance. Manufactured to P4A tolerance class, it delivers superior running accuracy and dimensional stability. Its universal matchable (SU) design allows for flexible mounting in various preload configurations, while the Extra Light (Class A) preload ensures low operating torque and minimal heat generation. This bearing is engineered to handle combined loads, providing reliable performance in high-precision spindles and other critical machinery.
S71903 CD/P4ADGA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| S7 | Series designation for high-precision angular contact ball bearings |
| 1903 | Bore size code (17 mm) |
| CD | Contact angle of 15° |
| P4A | High-precision tolerance class, superior to ABEC 7 |
| DG | Universal matchable (SU) pairing designation |
| A | Extra Light preload classification |
S71903 CD/P4ADGA Bearing Structural Features & Performance Benefits
This bearing's performance stems from its optimized design and material selection. The 15° contact angle provides an excellent balance between radial and axial load capacity. The phenolic resin cage offers high strength with low mass, contributing to the high-speed capability of 85,000 rpm. The P4A precision grade ensures minimal runout and vibration for superior application performance. Manufactured from chrome steel for both rings and balls, it delivers high durability and wear resistance. The universal matchable design allows for simplified mounting and optimal preload control in paired arrangements.
S71903 CD/P4ADGA Bearing Typical Application Areas
The S71903 CD/P4ADGA is ideally suited for high-precision, high-speed applications including:
- Machine tool spindles for milling, grinding, and turning centers
- High-frequency spindles for PCB drilling and precision machining
- Precision instruments and measuring equipment
- Medical device motors and dental handpieces
- Robotic joints and automation equipment requiring high positional accuracy
