71948 CD/P4ADGA
71900 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
71948 CD/P4ADGA
Basic Information
System of measurement
Metric
Weight
17 kg
Tolerance class
P4A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
240 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
320 mm
Outside diameter tolerance
-0.004mm to 0
Width
76 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
25.4 mm
Ball quantity
31
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
83475 lbf
Radial static load rating
144000 lbf
Limiting speed
7.5 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:
$ 4125.27
/ each
In Stock
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71948 CD/P4ADGA Bearing Product Overview & Core Advantages
The 71948 CD/P4ADGA is a precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and rigidity. Engineered to a P4A tolerance class, it offers superior running accuracy for high-performance machinery. Its universal matchable (SU) design allows for flexible mounting in various preload configurations, simplifying assembly and enabling optimal system performance. This bearing is pre-lubricated and capable of handling combined loads, making it an ideal choice for high-speed, high-precision spindles and other critical equipment requiring high rigidity and reliability.
71948 CD/P4ADGA Bearing Model Code Explained, Specifications & Naming Convention
The model number 71948 CD/P4ADGA is decoded as follows:
- 71948: Basic bearing series, indicating a high-precision angular contact design with a 240mm bore.
- C: Signifies a 15° contact angle, optimized for high-speed operation and moderate axial loads.
- D: Indicates the bearing is part of a universally matchable (SU) pair.
- P4A: Denotes an ultra-precision tolerance class exceeding ABEC 7/ISO P4 standards, ensuring minimal runout and vibration.
- DGA: Specifies a preload level of "Extra Light" (Class A).
71948 CD/P4ADGA Bearing Structural Features & Performance Benefits
- High Rigidity and Precision: Manufactured to P4A tolerance class with a phenolic cage, this bearing provides exceptional dimensional stability and minimizes vibration, which is critical for maintaining precision at high speeds.
- Optimized Load Capacity: The 15° contact angle and robust construction enable it to support significant combined (radial and axial) loads, with a dynamic load rating of 83,475 lbf and a static load rating of 144,000 lbf.
- Superior High-Speed Performance: The lightweight phenolic cage and optimized internal geometry contribute to a high limiting speed of 7,500 rpm, reducing centrifugal forces and operational temperatures.
- Universal Matching Capability (SU): As a universal matchable bearing, it can be paired with another identical bearing in various arrangements (back-to-back, face-to-face, or tandem) to achieve the desired preload and system stiffness without selective matching.
71948 CD/P4ADGA Bearing Typical Application Areas
This precision bearing is ideally suited for high-demand applications, including:
- Machine Tool Spindles (e.g., grinding, milling, and turning centers)
- High-Frequency Motors and Precision Spindles
- Aerospace Positioning Systems
- Medical Imaging Equipment (e.g., CT scanner gantries)
- Robotic Arm Joints and High-Speed Automation Equipment
