71913 CD/P4A
71900 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
71913 CD/P4A
Basic Information
System of measurement
Metric
Weight
0.21 kg
Tolerance class
P4 (ABEC-7)
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
65 mm
Bore diameter tolerance
-0.007mm to 0
Outside diameter
90 mm
Outside diameter tolerance
-0.008mm to 0
Width
13 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° to 110 °C
Radial dynamic load rating
4680 lbf
Radial static load rating
3825 lbf
Limiting speed
22 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:
$ 600.23
/ each
In Stock
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71913 CD/P4A Bearing Product Overview & Core Advantages
The 71913 CD/P4A is a single row angular contact ball bearing engineered for high-precision and high-speed applications. Its defining feature is the ability to support significant combined loads, managing both radial and substantial axial loads in one direction simultaneously. Manufactured to a P4 (ABEC-7) tolerance class, it guarantees exceptional running accuracy and rotational stability. The optimized internal geometry, including a 15° contact angle and phenolic cage, contributes to its superior performance, making it an ideal choice for demanding, compact assemblies requiring high reliability and rigidity.
71913 CD/P4A Bearing Model Code Explained, Specifications & Naming Convention
| 71913 | Basic series code indicating a metric, single row angular contact bearing with a 65mm bore, 90mm OD, and 13mm width. |
| C | Designates a 15° contact angle, optimized for high-speed operation. |
| D | Indicates that the bearing is part of a matched arrangement (in this case, a single bearing supplied for a specific preload). |
| P4A | Specifies the tolerance class P4 (ABEC-7), denoting very high precision. The 'A' suffix may indicate specific accuracy or internal design features within the P4 class. |
71913 CD/P4A Bearing Structural Features & Performance Benefits
- High Rigidity and Load Capacity: The single row design with a 15° contact angle provides excellent resistance to combined loads. The high-grade chrome steel construction ensures high dynamic and static load ratings (4680 lbf and 3825 lbf respectively).
- Superior High-Speed Performance: The lightweight phenolic resin cage minimizes centrifugal forces, enabling a high limiting speed of 22,000 rpm. The optimized internal geometry further enhances high-speed stability.
- Precision and Low Vibration: Manufactured to P4 precision class with tight dimensional tolerances, this bearing ensures minimal runout and smooth, quiet operation, critical for precision spindles.
- Preload and Stiffness: Supplied as a preloaded single unit, the bearing delivers increased system rigidity, reduces deflection under load, and improves rotational accuracy.
71913 CD/P4A Bearing Typical Application Areas
This high-precision angular contact bearing is ideally suited for applications demanding high speed, rigidity, and accuracy. Key industries and equipment include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling spindles and high-frequency motor spindles.
- Robotics: High-accuracy joints and actuators.
- Medical Equipment: Dental handpieces and imaging device rotors.
- Axial Pumps and Compressors: Where high axial and radial loads are present.
