71901 CD/P4ADBB
71900 Series Super Precision Angular Contact Ball Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
71901 CD/P4ADBB
Basic Information
System of measurement
Metric
Weight
0.02 kg
Tolerance class
P4A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
12 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
24 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
13
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
981 lbf
Radial static load rating
562 lbf
Limiting speed
220 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Duplex Back-to-Back (DB)
Number of bearings in matched set
2
Universal matching bearing
No (Standard)
Preload
Light / Class B
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.
Our sales team will respond within 24 hours with a competitive quote tailored to your requirements.
REQUEST A QUOTE
- Fast delivery
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
71901 CD/P4ADBB Bearing Product Overview & Core Advantages
The 71901 CD/P4ADBB is a precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and rigidity. This duplex back-to-back (DB) arrangement is preloaded to Light / Class B specifications, providing superior system stiffness and minimizing axial and radial runout. Its primary advantage lies in its ability to handle combined loads efficiently, making it ideal for high-precision, high-speed spindles and machinery where positional accuracy is critical.
71901 CD/P4ADBB Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71901 | Bearing series and size designation (12mm bore, 24mm OD). |
| C | 15° contact angle, optimized for high-speed applications with moderate axial loads. |
| D | Duplex bearing (two single bearings supplied as a set). |
| P4A | High precision tolerance class, ensuring extremely tight dimensional and running accuracy. |
| DBB | Duplex Back-to-Back arrangement. This configuration provides high moment rigidity and is excellent for withstanding overturning moments. |
71901 CD/P4ADBB Bearing Structural Features & Performance Benefits
- High Rigidity & Stability: The back-to-back duplex arrangement creates a wide effective spread of the load, significantly increasing the bearing system's rigidity and stability against moment loads.
- Precision Performance: Manufactured to P4A tolerance class with a light preload, this bearing ensures minimal runout, smooth operation, and precise shaft positioning, which is critical for high-speed and high-accuracy applications.
- Optimized for Speed: The phenolic resin cage is lightweight and robust, contributing to lower friction and enabling a high limiting speed of 220,000 rpm. The 15° contact angle provides a balanced capability for radial and axial loads at high rotational speeds.
- Superior Material: Constructed from chrome steel for both rings and balls, ensuring high durability, wear resistance, and a long operational life under demanding conditions.
71901 CD/P4ADBB Bearing Typical Application Areas
This precision angular contact ball bearing is engineered for the most demanding applications, including:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Instrumentation: Measuring devices, optical scanners, and coordinate measuring machines (CMM).
- High-Frequency Spindles: PCB drilling and routing spindles.
- Robotics: High-precision joints and arm assemblies requiring high rigidity and accuracy.
