71908 CD/P4ADGC
71900 Series Super Precision Angular Contact Ball Bearings
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71908 CD/P4ADGC Bearing Product Overview & Core Advantages
The 71908 CD/P4ADGC is a precision angular contact ball bearing designed for applications requiring exceptional rotational accuracy and rigidity. As a universally matchable (SU) bearing supplied in a pre-set pair, it delivers superior performance in handling combined radial and axial loads. Manufactured to the stringent P4A tolerance class, it features a phenolic cage and is pre-lubricated, making it an ideal solution for high-speed, high-precision machinery where reliability is paramount.
71908 CD/P4ADGC Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71908 | Standard bearing series designation, indicating a metric, angular contact type with a 40mm bore. |
| CD | Indicates a universal matchable (SU) bearing pair with a specific contact angle arrangement (typically 15° back-to-back) for optimal load sharing and rigidity. |
| P4A | Denotes a high-precision tolerance class, with enhanced running accuracy for demanding applications. |
| DGC | Signifies a Moderate preload (Class C) and that the bearing is supplied lubricated from the factory. |
71908 CD/P4ADGC Bearing Structural Features & Performance Benefits
High Rigidity and Load Capacity: The universal matchable (SU) design, when used in a pair (CD arrangement), creates a highly rigid bearing system capable of supporting significant combined radial and axial loads from both directions.
Optimized High-Speed Performance: The lightweight phenolic cage minimizes centrifugal forces, contributing to a high limiting speed of 56,000 rpm. The standard 15° contact angle provides an excellent balance between axial load capacity and speed capability.
Precision and Longevity: Manufactured to P4A tolerance class with a Moderate preload (Class C), this bearing ensures minimal runout and smooth, precise operation. The pre-applied lubrication ensures immediate readiness and protects against initial wear.
71908 CD/P4ADGC Bearing Typical Application Areas
This high-precision angular contact ball bearing is ideally suited for applications where accuracy, speed, and rigidity are critical. Common uses include:
- Machine Tool Spindles
- High-Frequency Motors
- Precision Grinding Spindles
- Industrial Pumps and Compressors
- Robotic Arm Joints and Precision Gearboxes
