71920 CD/P4A
71900 Series Super Precision Angular Contact Ball Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
71920 CD/P4A
Basic Information
System of measurement
Metric
Weight
0.8 kg
Tolerance class
P4 (ABEC-7)
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
100 mm
Bore diameter tolerance
-0.008mm to 0
Outside diameter
140 mm
Outside diameter tolerance
-0.009mm to 0
Width
20 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
12.7 mm
Ball quantity
26
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
13612 lbf
Radial static load rating
14738 lbf
Limiting speed
14 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Single
Preload
Available
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:
$ 284.59
/ each
In Stock
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71920 CD/P4A Bearing Product Overview & Core Advantages
The 71920 CD/P4A is a single-row angular contact ball bearing designed for high-precision applications requiring exceptional rotational accuracy and rigidity. Engineered to a P4 (ABEC-7) tolerance class, it is optimized to handle significant axial loads in one direction while supporting combined radial and axial loads. Its phenolic resin cage and 15° contact angle contribute to superior high-speed performance and smooth operation, making it an ideal choice for machine tool spindles and other demanding industrial equipment.
71920 CD/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Suffix | Technical Meaning |
|---|---|
| CD | Indicates a specific optimized internal design with a 15° contact angle, typically for high-speed, high-precision applications. |
| P4A | Denotes a high-precision tolerance class (equivalent to ABEC-7), ensuring minimal runout and superior dimensional accuracy for demanding applications. |
71920 CD/P4A Bearing Structural Features & Performance Benefits
- High Rigidity & Precision: The single-row angular contact design with a 15° contact angle provides high rigidity and precise running accuracy, essential for machine tool spindles and other high-performance machinery.
- Superior Load Capacity: Engineered to efficiently support combined radial and axial loads in one direction, with a high dynamic load rating of 13,612 lbf and static load rating of 14,738 lbf.
- Optimized High-Speed Performance: The lightweight phenolic resin cage reduces centrifugal forces, enabling a high limiting speed of 14,000 rpm and ensuring stable operation at high rotational speeds.
- Pre-Lubricated & Open Design: The bearing is pre-lubricated for immediate use and features an open design, allowing for customized re-lubrication strategies to suit specific operational requirements.
71920 CD/P4A Bearing Typical Application Areas
This precision angular contact bearing is ideally suited for applications demanding high speed, accuracy, and rigidity, including:
- Machine Tool Spindles
- High-Frequency Motors
- Precision Grinding Spindles
- Industrial Pumps and Compressors
- Medical and Dental Equipment
