71908 CDGC/P4A
71900 Series Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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71908 CDGC/P4A Bearing Product Overview & Core Advantages
The 71908 CDGC/P4A is a single-row angular contact ball bearing designed for applications requiring high precision and moderate preload. Manufactured to P4A tolerance class, this bearing delivers exceptional running accuracy and dimensional stability. Its 15° contact angle is optimized to handle combined loads, efficiently supporting both radial and axial forces. The phenolic resin cage and factory-applied lubrication enable smooth operation at high speeds up to 56,000 rpm, making it ideal for precision spindles and other demanding applications where rigidity and reliability are critical.
71908 CDGC/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71908 | Basic bearing designation indicating size series (71) and bore diameter (08 = 40mm) |
| CD | Contact angle designation (15°) optimized for combined load capacity |
| GC | Preload classification indicating Moderate / Class C preload for optimal rigidity |
| P4A | High precision tolerance class ensuring superior dimensional accuracy and running performance |
71908 CDGC/P4A Bearing Structural Features & Performance Benefits
High Precision Construction: Manufactured to P4A tolerance standards with tight dimensional control (bore and OD tolerance: -0.004mm to 0) for exceptional running accuracy in precision applications.
Optimized Load Capacity: The 15° contact angle provides excellent performance under combined radial and axial loads, with dynamic load rating of 2790 lbf and static load rating of 1912 lbf.
High-Speed Capability: The phenolic resin cage offers reduced friction and weight, contributing to the bearing's impressive limiting speed of 56,000 rpm while maintaining dimensional stability.
Universal Matching Design: Designed as Universal Matchable (SU) with three bearings in matched set, allowing for precise preload control and simplified mounting in multiple configurations.
Premium Material Selection: Constructed from chrome steel for both rings and balls, ensuring durability and consistent performance across the operating temperature range of -30°C to 110°C.
71908 CDGC/P4A Bearing Typical Application Areas
- Machine Tool Spindles - High-speed machining centers and precision grinding applications
- Precision Instrumentation - Measuring equipment and laboratory instruments requiring exceptional accuracy
- High-Speed Motors - Electric spindle motors and servo drives demanding minimal vibration
- Medical Equipment - Dental handpieces and surgical tools where reliability and precision are critical
- Aerospace Components - Guidance systems and auxiliary power units requiring high precision bearings
