71906 CD/P4A
71900 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
71906 CD/P4A
Basic Information
System of measurement
Metric
Weight
0.048 kg
Tolerance class
P4 (ABEC-7)
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
30 mm
Bore diameter tolerance
-0.005mm to 0
Outside diameter
47 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
20
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
1609 lbf
Radial static load rating
1024 lbf
Limiting speed
50 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:
$ 69.99
/ each
In Stock
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71906 CD/P4A Bearing Product Overview & Core Advantages
The 71906 CD/P4A is a single row angular contact ball bearing designed for applications demanding high precision and superior running accuracy. Manufactured to a P4 (ABEC-7) tolerance class, it is engineered to handle combined loads, with a primary capacity for thrust loads in one direction. Its compact design, featuring a 9 mm width, makes it an ideal solution for high-speed spindles and other precision machinery where space is at a premium and high rigidity is essential.
71906 CD/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71906 | Basic bearing designation, indicating a high-precision angular contact bearing series with a 30 mm bore. |
| C | Denotes a 15° contact angle, optimized for high-speed applications requiring high rigidity. |
| D | Indicates the bearing is supplied with a specific preload for enhanced stiffness and rotational accuracy. |
| P4A | Specifies the tolerance class P4 (ABEC-7), ensuring extremely tight dimensional and running accuracy tolerances. |
71906 CD/P4A Bearing Structural Features & Performance Benefits
- High Rigidity and Precision: The single row design with a 15° contact angle and applied preload provides exceptional system rigidity and minimizes axial and radial runout, which is critical for high-precision machining and instrumentation.
- Optimized for High Speeds: The lightweight phenolic resin cage reduces centrifugal forces, enabling a high limiting speed of 50,000 rpm. This makes the bearing suitable for very high-speed applications.
- Superior Load Capacity: Engineered to support significant combined loads, with a dynamic load rating of 1609 lbf and a static load rating of 1024 lbf, ensuring reliable performance under demanding conditions.
- Premium Materials: Constructed from chrome steel for both rings and balls, the bearing offers high durability, wear resistance, and a long operational life.
71906 CD/P4A Bearing Typical Application Areas
This bearing is ideally suited for high-performance applications, including:
- Machine Tool Spindles
- High-Frequency Motors
- Precision Grinding Spindles
- Dental and Medical Handpieces
- Aerospace Instrumentation
