71913 CD/P4ADFA
71900 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
71913 CD/P4ADFA
Basic Information
System of measurement
Metric
Weight
0.42 kg
Tolerance class
P4A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
65 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
90 mm
Outside diameter tolerance
-0.004mm to 0
Width
26 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
7.938 mm
Ball quantity
26
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
7470 lbf
Radial static load rating
7538 lbf
Limiting speed
31 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Duplex Face-to-Face (DF)
Number of bearings in matched set
2
Universal matching bearing
No (Standard)
Preload
Extra light / Class A
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
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71913 CD/P4ADFA Bearing Product Overview & Core Advantages
The 71913 CD/P4ADFA is a precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and rigidity. This duplex bearing comes pre-arranged in a Face-to-Face (DF) configuration, offering superior stability and the ability to accommodate combined loads (radial and axial). Manufactured to the stringent P4A tolerance class and featuring an Extra Light (A) preload, it is engineered for high-speed operation and high-reliability performance in precision machinery.
71913 CD/P4ADFA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71913 | Basic bearing designation, defining the bearing dimensions (65mm bore, 90mm OD, 26mm width). |
| C | Designates a 15° contact angle, optimized for high-speed applications with significant axial loads. |
| D | Indicates the bearing is part of a Duplex (matched) set. |
| P4A | Specifies the tolerance class, indicating very high precision levels for dimensional and running accuracy. |
| DF | Denotes the Face-to-Face mounting arrangement of the duplex pair, providing high moment stiffness. |
| A | Specifies an Extra Light preload for minimal friction and optimal high-speed performance. |
71913 CD/P4ADFA Bearing Structural Features & Performance Benefits
- High Rigidity & Stability: The duplex DF arrangement creates a highly rigid bearing system that effectively resists moment loads, making it ideal for spindles requiring precise shaft positioning.
- Superior Load Capacity: The angular contact design with a 15° contact angle enables the bearing to handle significant combined radial and axial loads simultaneously.
- Optimized High-Speed Performance: The combination of a phenolic cage (lightweight and robust), a 15° contact angle, and extra light preload allows for a high limiting speed of 31,000 rpm, minimizing heat generation and power loss.
- Precision Engineering: Manufactured to P4A tolerance class with tight dimensional control, this bearing ensures minimal runout and vibration for superior operational accuracy.
- Durable Construction: Components made from chrome steel provide high fatigue resistance and long service life under demanding conditions.
71913 CD/P4ADFA Bearing Typical Application Areas
This precision bearing is ideally suited for high-performance applications, including:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Drives: High-frequency motor spindles and servo drives.
- Industrial Pumps & Compressors: Applications requiring high-speed rotation and axial load support.
- Robotics: High-accuracy joints and rotary actuators.
- Aerospace & Defense Systems: Gyroscopes, radar systems, and other precision instrumentation.
