71830 CDGB/P4
71800 Series Super Precision Angular Contact Ball Bearings
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71830 CDGB/P4 Bearing Product Overview & Core Advantages
The 71830 CDGB/P4 is a single-row angular contact ball bearing engineered for applications demanding high precision and exceptional running accuracy. Positioned in the P4 tolerance class, it guarantees minimal dimensional and rotational runout deviations. Its key advantage lies in its ability to accommodate high-speed operation (with a limiting speed of 11,000 rpm) while sustaining significant combined loads—primarily radial and axial loads in one direction. The bearing features a Universal Matchable (SU) design, allowing two bearings to be precisely matched for optimal preload and performance in duplex arrangements. With a light preload (Class B) and a phenolic cage, it delivers smooth operation, low heat generation, and high rigidity, making it ideal for high-performance spindles and precision machinery.
71830 CDGB/P4 Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Significance |
|---|---|---|
| 71830 | Basic bearing designation (150mm bore, 190mm OD, 20mm width) | Defines the core bearing dimensions. |
| C | 15° Contact Angle | Optimized for high axial load capacity and high-speed performance. |
| D | Light Preload (Class B) | Reduces deflection and vibration, enhancing rigidity and positioning accuracy. |
| GB | Universal Matchable (SU) bearing set | Ensures two bearings can be paired for precise preload control in back-to-back (DB) or face-to-face (DF) mounting. |
| /P4 | Tolerance Class P4 | Denotes high precision with extremely tight tolerances on bore, OD, width, and runout. |
71830 CDGB/P4 Bearing Structural Features & Performance Benefits
- High Rigidity & Precision: The combination of a 15° contact angle and a factory-applied light preload (Class B) significantly increases system rigidity, minimizing shaft deflection under load and ensuring exceptional running accuracy, which is critical for precision machining.
- Optimized Load Capacity: As an angular contact ball bearing, it is designed to support substantial combined loads. The radial dynamic load rating of 11,700 lbf and static load rating of 16,200 lbf allow it to handle both radial and unidirectional axial loads simultaneously.
- Superior High-Speed Performance: The lightweight, high-strength phenolic cage minimizes centrifugal forces and ensures stable guidance of the 35 precision balls. This, combined with the optimized internal geometry, enables reliable operation at the high limiting speed of 11,000 rpm.
- Universal Matching Capability: The Universal Matchable (SU) feature allows for the selective assembly of two bearings. This enables the creation of a pre-defined, rigid bearing system (duplex pair) without the need for complex shimming or adjustment during installation.
71830 CDGB/P4 Bearing Typical Application Areas
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling machines, high-frequency motor spindles.
- Robotics: High-accuracy joints and rotary actuators.
- Medical Equipment: Dental handpieces, centrifuges, and imaging devices.
- Aerospace & Defense: Gyroscopes, radar systems, and navigation equipment.
