71930 CD/P4ADGA
71900 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
71930 CD/P4ADGA
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
Extra light / Class A
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/P4ADGA Bearing Product Overview & Core Advantages
The 71930 CD/P4ADGA is a super-precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and rigidity. As part of a universally matchable (SU) set, it is engineered to accommodate combined radial and axial loads simultaneously. Its P4A tolerance class and extra light preload (Class A) ensure smooth, high-speed operation with minimal vibration, making it ideal for high-precision, high-reliability spindles and machinery.
71930 CD/P4ADGA Bearing Model Code Explained, Specifications & Naming Convention
The model number 71930 CD/P4ADGA provides detailed technical specifications:
- 71930: Basic bearing series and size designation (150mm bore, 210mm OD).
- C: Represents a 15° contact angle, optimized for high-speed performance.
- D: Indicates the bearing is part of a universally matchable (SU) pair.
- P4A: Denotes an ultra-high precision tolerance class, exceeding ABEC 7/ISO P4 standards, which includes strict controls on running accuracy.
- DGA: Specifies a phenolic (polyamide) cage and a universal matchable (SU) arrangement with extra light preload (Class A).
71930 CD/P4ADGA Bearing Structural Features & Performance Benefits
- High Rigidity and Precision: The double-row angular contact design and P4A tolerance class provide superior radial and axial stiffness, ensuring exceptional running accuracy and system stability under demanding operational conditions.
- Superior Load Capacity: Engineered with a 15° contact angle and robust construction, this bearing effectively handles significant combined (radial and axial) loads.
- Optimized High-Speed Performance: The lightweight phenolic cage reduces centrifugal forces, while the precision-ground chrome steel components and optimized internal geometry contribute to a high limiting speed of 11,000 rpm.
- Universal Matchability (SU): Bearings marked "SU" can be universally paired in any combination to form a preloaded duplex set (DB, DF, DT), offering design flexibility and simplified mounting procedures.
71930 CD/P4ADGA Bearing Typical Application Areas
This super-precision bearing is ideally suited for high-performance applications, including:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling, high-frequency motor spindles.
- Industrial Pumps and Compressors
- Robotics and Automation Equipment
