708 CDGA/P4A
Miniature Super Precision Angular Contact Ball Bearings
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708 CDGA/P4A Bearing Product Overview & Core Advantages
The 708 CDGA/P4A is a single row angular contact ball bearing designed for high-precision applications requiring exceptional rotational accuracy. As a P4A tolerance class bearing, it offers superior dimensional and running accuracy, making it ideal for machine tool spindles and other precision machinery. Its 15° contact angle is optimized to support significant axial loads in one direction while also accommodating radial loads. The bearing comes pre-lubricated and is part of a Universal Matchable (SU) set, allowing for precise preload control when mounted in pairs. This combination of high precision, specific load capacity, and universal matchability makes it a critical component for applications demanding high rigidity and low runout.
708 CDGA/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Significance |
|---|---|---|
| 708 | Basic bearing series | Denotes the bearing size series with 8mm bore diameter |
| CDGA | Contact angle and preload designation | 15° contact angle with Extra Light (Class A) preload |
| P4A | Tolerance class | High precision tolerance class superior to ABEC 7 |
708 CDGA/P4A Bearing Structural Features & Performance Benefits
High Precision Construction: Manufactured to P4A tolerance class standards, this bearing ensures minimal dimensional variation and superior running accuracy, critical for applications requiring high positional precision.
Optimized Load Capacity: The 15° contact angle provides excellent axial load capacity in one direction while maintaining good radial load performance. With a dynamic load rating of 731 lbf and static load rating of 308 lbf, it delivers reliable performance under combined loading conditions.
High-Speed Capability: Featuring a phenolic resin cage that reduces centrifugal forces and friction, the bearing achieves a limiting speed of 110,000 rpm, making it suitable for high-speed spindle applications.
Universal Matching Design: As a Universal Matchable (SU) bearing, it can be paired with another identical bearing in various configurations (back-to-back, face-to-face, or tandem) to achieve specific preload and stiffness requirements without selective matching.
708 CDGA/P4A Bearing Typical Application Areas
- Machine Tool Spindles: High-precision machining centers, grinding spindles, and milling spindles
- Precision Instruments: Measuring equipment, optical instruments, and laboratory apparatus
- High-Speed Motors: Small precision motors and high-frequency spindles
- Medical Equipment: Dental handpieces, surgical tools, and diagnostic instruments
- Robotics: Precision joints and small robotic actuators requiring high accuracy
