71908 ACD/P4ADGB
71900 Series Super Precision Angular Contact Ball Bearings
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71908 ACD/P4ADGB Bearing Product Overview & Core Advantages
The 71908 ACD/P4ADGB is a precision angular contact ball bearing designed for applications requiring exceptional accuracy and reliability. Manufactured to P4A tolerance class, this bearing delivers superior rotational precision and dimensional stability. Its 25° contact angle and universal matchable (SU) design enable it to handle combined radial and axial loads efficiently while maintaining high rigidity. The phenolic cage and optimized internal geometry contribute to its excellent high-speed performance, making it ideal for demanding precision applications.
71908 ACD/P4ADGB Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71908 | Basic bearing designation indicating size series and bore diameter |
| ACD | Angular contact design with 25° contact angle |
| P4A | High precision tolerance class for superior running accuracy |
| DGB | Universal matchable (SU) arrangement designation |
71908 ACD/P4ADGB Bearing Structural Features & Performance Benefits
High Precision Construction: Manufactured to P4A tolerance standards with bore diameter tolerance of -0.004mm to 0 and outside diameter tolerance of -0.004mm to 0, ensuring exceptional dimensional accuracy and consistent performance.
Optimized Load Capacity: The 25° contact angle enables efficient handling of combined loads with radial dynamic load rating of 4275 lbf and radial static load rating of 3600 lbf, providing reliable operation under demanding conditions.
Superior High-Speed Performance: The phenolic cage material and precision-ground chrome steel components allow for limiting speeds up to 56,000 rpm, making it suitable for high-speed applications.
Universal Matching Capability: Designed as Universal Matchable (SU) bearings, they can be mounted in various configurations (back-to-back, face-to-face, or tandem) to optimize performance for specific application requirements.
Pre-optimized Performance: The light preload (Class B) ensures smooth operation with minimal friction while maintaining precise shaft positioning.
71908 ACD/P4ADGB Bearing Typical Application Areas
- Machine Tool Spindles - High-precision machining centers and grinding spindles
- Precision Instrumentation - Measuring devices and laboratory equipment
- High-Speed Motors - Spindle motors and high-frequency applications
- Medical Equipment - Dental handpieces and surgical tools
- Aerospace Components - Guidance systems and precision mechanisms
- Robotics - Precision joints and positioning systems
