71908 ACDGB/P4A
71900 Series Super Precision Angular Contact Ball Bearings
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71908 ACDGB/P4A Bearing Product Overview & Core Advantages
The 71908 ACDGB/P4A is a single-row angular contact ball bearing designed for high-precision applications requiring exceptional rotational accuracy and rigidity. Manufactured to P4A tolerance class, it delivers superior running precision. Its key advantage lies in its ability to accommodate combined radial and axial loads simultaneously, making it ideal for high-speed spindles and other demanding machinery. The Universal Matchable (SU) design allows for flexible mounting in various preload configurations, while the phenolic cage and optimized 25° contact angle contribute to its outstanding high-speed performance and operational stability.
71908 ACDGB/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Significance |
|---|---|---|
| 71908 | Basic bearing series and size designation | Indicates a high-precision angular contact bearing series with 40mm bore, 62mm OD, and 12mm width |
| AC | Angular Contact design | Optimized for combined radial and axial loads |
| DGB | Contact angle and Universal Match designation | 25° contact angle with Universal Matchable (SU) capability for flexible mounting arrangements |
| P4A | Tolerance Class | High-precision grade with tight dimensional and running accuracy tolerances |
71908 ACDGB/P4A Bearing Structural Features & Performance Benefits
High Precision Construction: Manufactured to P4A tolerance class with bore and outside diameter tolerances of -0.004mm to 0, ensuring exceptional running accuracy and dimensional stability.
Optimized Load Capacity: The 25° contact angle and chrome steel construction provide excellent capacity for combined radial and axial loads, with a dynamic load rating of 2632 lbf and static load rating of 1800 lbf.
Superior High-Speed Performance: The phenolic cage and optimized internal geometry enable a limiting speed of 41,000 rpm, making it ideal for high-speed applications requiring minimal vibration and heat generation.
Universal Matching Capability: As a Universal Matchable (SU) bearing, it can be mounted in various preload configurations (Light / Class B), providing design flexibility and optimal performance in different operational conditions.
71908 ACDGB/P4A Bearing Typical Application Areas
The 71908 ACDGB/P4A is specifically engineered for high-precision, high-speed applications including:
- Machine Tool Spindles - High-speed machining centers and precision grinding applications
- Precision Instrumentation - Measuring equipment and laboratory instruments requiring exceptional accuracy
- High-Speed Motors - Spindle motors and high-RPM drive systems
- Medical Equipment - Dental handpieces and surgical tool drives
- Aerospace Components - Guidance systems and precision positioning mechanisms
