729 CDGB/P4A
Miniature Super Precision Angular Contact Ball Bearings
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729 CDGB/P4A Bearing Product Overview & Core Advantages
The 729 CDGB/P4A is a single-row angular contact ball bearing designed for high-precision applications requiring exceptional rotational accuracy. Manufactured to P4A tolerance class, this bearing delivers superior running accuracy and dimensional stability. Its 15° contact angle is optimized to handle significant axial loads in one direction while supporting combined radial and axial loads. The phenolic resin cage and factory-applied lubrication enable smooth operation at high speeds, making it an ideal solution for machine tool spindles and other precision machinery where high rigidity and minimal runout are critical requirements.
729 CDGB/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning | Performance Benefit |
|---|---|---|
| CDGB | Universal Matchable bearing set with specific preload and tolerance | Enables precise bearing arrangement with optimized stiffness and minimal axial play |
| P4A | High precision tolerance class (ABEC 7 equivalent) | Ensures exceptional running accuracy and dimensional stability for precision applications |
729 CDGB/P4A Bearing Structural Features & Performance Benefits
Precision Engineering: The P4A tolerance class guarantees tight dimensional control with bore diameter tolerance of -0.004mm to 0 and outside diameter tolerance of -0.004mm to 0, ensuring perfect fit and minimal vibration in high-speed applications.
High-Speed Capability: The phenolic resin cage provides excellent strength-to-weight ratio and smooth operation at the limiting speed of 95,000 rpm. Combined with factory lubrication, this enables reliable performance in demanding high-speed environments.
Optimized Load Capacity: With a 15° contact angle and 9 precision balls of 4.762mm diameter, the bearing achieves a radial dynamic load rating of 922 lbf and radial static load rating of 374 lbf, making it suitable for applications requiring both radial and axial load support.
Universal Matching Design: As a Universal Matchable (SU) bearing with Light Preload (Class B), it can be paired with identical bearings in various configurations to achieve specific stiffness requirements without additional adjustment.
729 CDGB/P4A Bearing Typical Application Areas
- Machine Tool Spindles: High-precision machining centers and grinding spindles requiring exceptional running accuracy
- Precision Instrumentation: Measuring equipment and laboratory instruments demanding minimal vibration and high positional accuracy
- High-Speed Motors: Spindle motors and high-frequency applications where rotational precision is critical
- Medical Equipment: Dental handpieces and surgical tools requiring reliable high-speed operation
- Robotics: Precision joints and servo mechanisms needing high rigidity and accurate positioning
