71908 CD/P4ADGB
71900 Series Super Precision Angular Contact Ball Bearings
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71908 CD/P4ADGB Bearing Product Overview & Core Advantages
The 71908 CD/P4ADGB is a precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and rigidity. Operating under the stringent P4A tolerance class, this bearing is engineered to handle combined loads, offering superior performance in high-speed and high-precision environments. Its Universal Matchable (SU) design allows for flexible mounting in preloaded pairs, significantly enhancing system stiffness and operational reliability. The phenolic cage and optimized internal geometry contribute to its excellent high-speed capabilities, making it an ideal choice for advanced industrial machinery.
71908 CD/P4ADGB Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71908 | Basic bearing series and size designation |
| CD | 15° contact angle and optimized internal design |
| P4A | High-precision tolerance class exceeding ABEC 7 |
| DGB | Universal Matchable (SU) bearing for duplex pairs |
71908 CD/P4ADGB Bearing Structural Features & Performance Benefits
High Rigidity & Precision: The angular contact design with a 15° contact angle provides exceptional axial and radial stiffness. Manufactured to P4A tolerance standards, it ensures minimal runout and superior rotational accuracy for precision applications.
Optimized Load Capacity: Engineered to handle combined radial and axial loads simultaneously. With a dynamic load rating of 4478 lbf and static load rating of 3825 lbf, it delivers reliable performance under demanding operating conditions.
High-Speed Performance: The phenolic cage and precision-ground chrome steel components enable stable operation at high rotational speeds, with a limiting speed of 56,000 rpm. The open design facilitates efficient lubrication management.
Universal Matching Capability: As a Universal Matchable (SU) bearing, it can be mounted in preloaded pairs (back-to-back, face-to-face, or tandem) without selective matching, simplifying installation and enhancing system rigidity.
71908 CD/P4ADGB Bearing Typical Application Areas
The 71908 CD/P4ADGB precision angular contact bearing is ideally suited for:
- Machine Tool Spindles - High-speed machining centers and precision grinding applications
- High-Frequency Spindles - PCB drilling and precision milling equipment
- Robotic Systems - Precision joints and high-accuracy positioning systems
- Medical Equipment - Dental handpieces and surgical tool drives
- Aerospace Systems - Guidance systems and auxiliary power units
