71905 CD/P4A
71900 Series Super Precision Angular Contact Ball Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
71905 CD/P4A
Basic Information
System of measurement
Metric
Weight
0.042 kg
Tolerance class
P4 (ABEC-7)
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
25 mm
Bore diameter tolerance
-0.005mm to 0
Outside diameter
42 mm
Outside diameter tolerance
-0.006mm to 0
Width
9 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
4.762 mm
Ball quantity
18
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
1521 lbf
Radial static load rating
900 lbf
Limiting speed
56 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:
$ 47.34
/ each
In Stock
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71905 CD/P4A Bearing Product Overview & Core Advantages
The 71905 CD/P4A is a high-precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and rigidity. Engineered to a P4 (ABEC-7) tolerance class, this bearing is optimized to handle combined loads—simultaneous radial and axial forces—with superior performance. Its compact design, featuring a 9 mm width, makes it ideal for space-constrained, high-speed machinery. The phenolic cage and optimized 15° contact angle contribute to its high-speed capabilities and operational stability, making it a reliable choice for critical applications.
71905 CD/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Suffix | Technical Meaning |
|---|---|
| CD | Indicates a specific contact angle of 15° and optimized internal geometry for high-precision applications. |
| P4A | Denotes a very high precision tolerance class (equivalent to ABEC-7), ensuring minimal running noise and vibration for smooth operation. |
71905 CD/P4A Bearing Structural Features & Performance Benefits
- High Rigidity and Precision: The single-row design with a 15° contact angle and P4 tolerance provides excellent running accuracy and stiffness, essential for maintaining precise shaft positioning under load.
- Superior Load Capacity: Engineered to support combined loads effectively, with a dynamic load rating of 1521 lbf and a static load rating of 900 lbf.
- High-Speed Performance: The lightweight phenolic resin cage reduces centrifugal forces, enabling a high limiting speed of 56,000 rpm. The open design facilitates efficient lubrication management.
- Optimized for Precision Applications: Manufactured from chrome steel for both rings and balls, ensuring high durability and wear resistance in demanding environments.
71905 CD/P4A Bearing Typical Application Areas
This bearing is ideally suited for high-precision, high-speed machinery, including:
- Machine Tool Spindles
- Precision Grinding Spindles
- High-Frequency Motors
- Medical and Dental Equipment
- Aerospace Instrumentation
