71930 CD/P4ADGC
71900 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
71930 CD/P4ADGC
Basic Information
System of measurement
Metric
Weight
5 kg
Tolerance class
P4A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
150 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
210 mm
Outside diameter tolerance
-0.004mm to 0
Width
56 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
19.05 mm
Ball quantity
23
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
41850 lbf
Radial static load rating
58500 lbf
Limiting speed
11 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Universal Matchable (SU)
Number of bearings in matched set
2
Universal matching bearing
Universal Matchable (SU)
Preload
Moderate / Class C
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Phenolic
Technical Drawings
No drawings available at the moment, will be launched soon
Price:
$ 1781.49
/ each
In Stock
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71930 CD/P4ADGC Bearing Product Overview & Core Advantages
The 71930 CD/P4ADGC is a precision angular contact ball bearing designed for demanding applications requiring exceptional rotational accuracy and rigidity. As a universal matchable (SU) bearing supplied in a pre-set pair, it delivers superior performance in handling combined radial and axial loads. Manufactured to P4A tolerance class and featuring a moderate preload (Class C), this bearing is engineered for high-speed operation, outstanding dimensional stability, and reliable performance in precision machinery and spindles.
71930 CD/P4ADGC Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71930 | Basic bearing series and size designation (150mm bore, 210mm OD) |
| CD | Universal matchable bearing pair with a specific contact angle arrangement |
| P4A | High precision tolerance class exceeding ABEC 7 standards |
| DGC | Moderate preload (Class C) for optimal stiffness and running accuracy |
71930 CD/P4ADGC Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The universal matching (SU) design of two bearings creates a rigid bearing system capable of supporting significant combined loads from multiple directions. The 15° contact angle provides excellent axial load capacity while maintaining good radial performance.
- Precision Performance: Manufactured to P4A tolerance class with extremely tight dimensional tolerances (bore/OD: -0.004mm to 0), ensuring minimal runout and vibration for superior rotational accuracy.
- High-Speed Capability: The phenolic cage material and optimized internal geometry enable stable operation at high rotational speeds up to 11,000 rpm, making it ideal for high-speed spindle applications.
- Optimized Internal Design: Features 23 precision balls of 19.05mm diameter manufactured from chrome steel, providing high dynamic load capacity (41,850 lbf) and long service life under demanding conditions.
71930 CD/P4ADGC Bearing Typical Application Areas
- Machine Tool Spindles: High-precision machining centers, grinding spindles, and milling spindles requiring exceptional accuracy and rigidity
- Precision Industrial Equipment
- High-Speed Rotating Machinery: Precision pumps, compressors, and specialized industrial drives operating at elevated speeds
- Aerospace & Defense Systems: Gyroscopes, radar systems, and other precision rotational mechanisms demanding reliable performance
