71808 CD/P4DGA
71800 Series Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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71808 CD/P4DGA Bearing Product Overview & Core Advantages
The 71808 CD/P4DGA is a super-precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and high-speed performance. Manufactured to P4 tolerance class, this bearing excels in machine tool spindles and other high-precision equipment. Its key advantage lies in its ability to support combined loads (radial and axial) simultaneously, while the Extra light preload (Class A) ensures minimal friction and smooth operation. The Universal Matchable (SU) design allows for flexible mounting in duplex sets, providing superior system rigidity and operational stability.
71808 CD/P4DGA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71808 | Basic bearing series and size designation (40mm bore, 52mm OD) |
| CD | Contact angle of 15° and specific internal design |
| P4 | High-precision tolerance class |
| DGA | Universal Matchable (SU) arrangement designation |
71808 CD/P4DGA Bearing Structural Features & Performance Benefits
High-Precision Construction: Manufactured to P4 tolerance class with extremely tight dimensional control (bore/OD tolerance: -0.004mm to 0), ensuring minimal runout and vibration for superior positioning accuracy.
Optimized Contact Design: The 15° contact angle provides an ideal balance between radial and axial load capacity, making it suitable for applications with significant thrust loads.
High-Speed Capability: The phenolic cage offers excellent strength-to-weight ratio, contributing to the high limiting speed of 56,000 rpm while reducing centrifugal forces.
Universal Matching: As a Universal Matchable (SU) bearing, it can be paired in various preloaded configurations (back-to-back, face-to-face, or tandem) to achieve the required system stiffness without selective matching.
Premium Materials: Constructed from chrome steel for both rings and balls, providing high hardness, wear resistance, and dimensional stability under varying temperature conditions.
71808 CD/P4DGA Bearing Typical Application Areas
- Machine Tool Spindles: High-speed machining centers, grinding spindles, and precision milling applications
- Precision Instrumentation: Measuring equipment, optical instruments, and laboratory apparatus
- High-Speed Motors: Spindle motors, high-frequency motors, and servo drives
- Aerospace Components: Gyroscopes, navigation systems, and aircraft instrumentation
- Medical Equipment: Dental handpieces, surgical tools, and diagnostic imaging systems
