71913 CE/P4ADBB
71900 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
71913 CE/P4ADBB
Basic Information
System of measurement
Metric
Weight
0.4 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
24
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
6075 lbf
Radial static load rating
5512 lbf
Limiting speed
31 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
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71913 CE/P4ADBB Bearing Product Overview & Core Advantages
The 71913 CE/P4ADBB is a precision angular contact ball bearing designed for demanding applications requiring exceptional rotational accuracy and rigidity. This duplex back-to-back (DB) arrangement consists of two matched bearings, preloaded to deliver superior high rigidity and stability under combined loads. Manufactured to the stringent P4A tolerance class, it is engineered for high-speed operation and reliable performance in precision machinery. Its compact design and light preload (Class B) make it an ideal solution for spindles and other high-precision systems.
71913 CE/P4ADBB Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71913 | Basic bearing designation, indicating a metric, angular contact bearing series with a 65mm bore, 90mm OD, and 26mm width. |
| CE | Indicates a 15° contact angle, optimized for high-speed applications and handling combined radial and axial loads. |
| P4A | Specifies the tolerance class, denoting very high precision levels for dimensional and running accuracy. |
| DBB | Denotes the Duplex Back-to-Back matched arrangement, providing high moment rigidity and preload. |
71913 CE/P4ADBB Bearing Structural Features & Performance Benefits
- High Rigidity & Stability: The duplex back-to-back (DB) arrangement and light preload (Class B) create a highly rigid bearing system that effectively resists operational deflection and moment loads, ensuring precise shaft positioning.
- Superior Load Capacity: The 15° contact angle and optimized internal geometry enable the bearing to handle significant combined radial and axial loads simultaneously.
- High-Speed Performance: The lightweight phenolic resin cage reduces centrifugal forces, while the precision-ground chrome steel components contribute to smooth operation at the specified limiting speed of 31,000 rpm.
- Precision Engineering: Conforming to the P4A tolerance class, this bearing guarantees minimal runout and vibration, which is critical for applications requiring high rotational accuracy.
71913 CE/P4ADBB Bearing Typical Application Areas
This bearing is specifically designed for high-performance machinery, including:
- Machine Tool Spindles (High-speed milling, grinding)
- Precision Grinding Spindles
- High-Frequency Motors
- Industrial Pumps and Compressors
- Robotic Arm Joints and Precision Gearboxes
