71908 ACD/P4ATGB
71900 Series Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
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71908 ACD/P4ATGB Bearing Product Overview & Core Advantages
The 71908 ACD/P4ATGB is a precision angular contact ball bearing designed for applications requiring exceptional rotational accuracy and high-speed performance. Manufactured to P4A tolerance class, this bearing delivers superior dimensional stability and running precision. Its 25° contact angle and universal matchable (SU) design enable it to accommodate combined radial and axial loads simultaneously. The phenolic cage and optimized internal geometry contribute to its high limiting speed of 41,000 rpm, making it an ideal solution for high-precision, high-rigidity applications.
71908 ACD/P4ATGB Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71908 | Basic bearing series and size designation |
| ACD | 25° contact angle, universal matchable design |
| P4A | High precision tolerance class |
| TGB | Phenolic cage material designation |
71908 ACD/P4ATGB Bearing Structural Features & Performance Benefits
High Precision Construction: Manufactured to P4A tolerance standards with tight dimensional control (bore diameter tolerance: -0.004mm to 0), ensuring exceptional running accuracy and minimal vibration.
Optimized Load Capacity: The 25° contact angle and double-row equivalent design through universal matching provides excellent combined load capacity (radial dynamic: 5648 lbf, static: 5400 lbf).
High-Speed Performance: The phenolic cage and precision-ground chrome steel balls enable superior high-speed operation up to 41,000 rpm with minimal friction and heat generation.
Universal Matching Capability: The SU designation allows bearings to be universally matched in sets of three, providing preloaded configurations without selective assembly requirements.
71908 ACD/P4ATGB Bearing Typical Application Areas
- Machine tool spindles and high-precision rotating units
- High-speed machining centers and CNC equipment
- Precision grinding spindles and dental equipment
- Aerospace positioning systems and instrumentation
- Semiconductor manufacturing equipment
