71900 CD/P4ADT
71900 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
71900 CD/P4ADT
Basic Information
System of measurement
Metric
Weight
0.018 kg
Tolerance class
P4A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
10 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
22 mm
Outside diameter tolerance
-0.004mm to 0
Width
12 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
3.175 mm
Ball quantity
12
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
922 lbf
Radial static load rating
495 lbf
Limiting speed
165 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Duplex Tandem (DT)
Number of bearings in matched set
2
Universal matching bearing
No (Standard)
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
In Stock
Price available upon request.
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71900 CD/P4ADT Bearing Product Overview & Core Advantages
The 71900 CD/P4ADT is a precision angular contact ball bearing designed for high-speed applications requiring exceptional rigidity and accuracy. This duplex tandem (DT) matched set features a P4A tolerance class for superior running accuracy. Its primary advantage lies in its ability to handle significant combined loads (radial and axial) in one direction, making it ideal for high-precision spindles and other demanding machinery where uncompromising performance is critical.
71900 CD/P4ADT Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71900 | Basic bearing series designation, indicating a high-precision, ultra-light series with a 10mm bore. |
| C | Specifies a 15° contact angle, optimized for high-speed operation and axial load capacity. |
| D | Indicates the bearing is supplied with a preload for enhanced rigidity and reduced vibration. |
| P4A | Denotes an ultra-precision tolerance class exceeding ABEC 7, ensuring minimal runout and superior rotational accuracy. |
| DT | Signifies a Duplex Tandem arrangement. Two bearings are matched and mounted together to maximize axial load capacity in one direction. |
71900 CD/P4ADT Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The duplex tandem arrangement and preload create an exceptionally stiff bearing system. This configuration is engineered to handle high combined loads, providing superior support for spindles under heavy axial thrust.
- Ultra-High-Speed Performance: The combination of a 15° contact angle, lightweight phenolic resin cage, and precision grinding allows for a very high limiting speed of 165,000 rpm, making it suitable for the most demanding high-speed applications.
- Precision Engineering: Manufactured to P4A tolerance class with tight dimensional control on the bore diameter, outside diameter, and width, this bearing guarantees minimal vibration and exceptional running accuracy.
- Optimized Material Selection: The use of high-grade chrome steel for rings and balls ensures durability and long service life, while the phenolic cage contributes to lower friction and higher speed capability.
71900 CD/P4ADT Bearing Typical Application Areas
This bearing is specifically engineered for high-performance machinery where speed, precision, and rigidity are paramount. Key applications include:
- High-Frequency Spindles for PCB drilling and precision machining centers
- High-Speed Machine Tool Spindles
- Precision Grinding Spindles
- High-Speed Motors and encoders
- Other advanced machinery requiring ultra-precision angular contact bearings in a tandem configuration.
