71830 CD/P4DGB
71800 Series Super Precision Angular Contact Ball Bearings
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71830 CD/P4DGB Bearing Product Overview & Core Advantages
The 71830 CD/P4DGB is a precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and reliability. This universal matchable (SU) bearing features a light preload (Class B) and P4 tolerance class, making it ideal for high-speed spindles and precision machinery. Its 15° contact angle is optimized to handle combined loads—significant radial loads alongside axial loads in one direction—with high running accuracy. The phenolic cage contributes to superior high-speed performance, while the open design allows for customized lubrication schemes to meet specific operational requirements.
71830 CD/P4DGB Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71830 | Basic bearing designation indicating size series (71) and bore diameter (150mm) |
| CD | Contact angle of 15° and high-precision design |
| P4 | Tolerance class equivalent to ISO Class 4 (super precision) |
| DGB | Universal matchable (SU) arrangement, light preload (Class B) |
71830 CD/P4DGB Bearing Structural Features & Performance Benefits
High Precision & Rigidity: Manufactured to P4 tolerance class with extremely tight dimensional tolerances (bore/OD: -0.004mm to 0), ensuring minimal runout and vibration for superior positioning accuracy. The 15° contact angle provides optimal stiffness under combined loading conditions.
Superior High-Speed Capability: The phenolic resin cage offers excellent strength-to-weight ratio and smooth operation at high rotational speeds, supporting a limiting speed of 11,000 rpm. The open design facilitates efficient lubrication management for thermal stability.
Enhanced Load Capacity: With 35 chrome steel balls of 11.112mm diameter, this bearing delivers high dynamic load rating (18,720 lbf) and static load rating (32,850 lbf), providing reliable performance under demanding operational conditions.
Universal Matching Capability: As an SU-type universal matchable bearing, it can be paired with another identical bearing in various preload configurations, offering flexibility in application design and simplified inventory management.
71830 CD/P4DGB Bearing Typical Application Areas
- Machine Tool Spindles: High-precision milling, grinding, and turning centers
- Precision Robotics: Joint and arm articulation systems requiring high accuracy
- Medical Equipment: CT scanners, dental drills, and laboratory automation
- Aerospace Systems: Guidance mechanisms and control surface actuators
- High-Speed Motors: Spindle drives and precision servo motors
