71903 CD/P4ADFC
71900 Series Super Precision Angular Contact Ball Bearings
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71903 CD/P4ADFC Bearing Product Overview & Core Advantages
The 71903 CD/P4ADFC is a precision angular contact ball bearing designed for demanding applications requiring exceptional rotational accuracy and rigidity. This metric system bearing features a duplex face-to-face (DF) arrangement with a moderate preload (Class C), delivering superior stability and performance under combined loads. Its compact design, with a 17 mm bore and 14 mm width, makes it ideal for high-speed spindles and precision machinery where space is constrained and reliability is paramount.
71903 CD/P4ADFC Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71903 | Basic bearing series and size designation. |
| CD | Indicates a duplex face-to-face (DF) mounting arrangement. |
| P4A | Specifies the tolerance class P4A, denoting very high precision levels for runout and dimensional accuracy. |
| DFC | Denotes a moderate preload (Class C) applied to the duplex set. |
71903 CD/P4ADFC Bearing Structural Features & Performance Benefits
High Rigidity & Stability: The duplex face-to-face (DF) arrangement and applied preload significantly increase system stiffness, minimizing axial and radial deflection under load for enhanced machining accuracy.
Superior Load Capacity: The 15° contact angle is optimized to handle substantial combined radial and axial loads simultaneously, making it suitable for complex loading conditions.
High-Speed Performance: The lightweight phenolic resin cage ensures excellent stability and low friction at the limiting speed of 121,000 rpm, reducing centrifugal forces and heat generation.
Precision Engineering: Manufactured to P4A tolerance class with tight dimensional control on bore, outside diameter, and width, ensuring consistent, high-precision performance in the most demanding applications.
71903 CD/P4ADFC Bearing Typical Application Areas
The 71903 CD/P4ADFC is engineered for high-performance applications, including:
- Machine Tool Spindles
- High-Frequency Motors
- Precision Grinding Equipment
- Robotic Drives and Actuators
- Medical and Dental Handpieces
