71913 CE/P4ADFA
71900 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
71913 CE/P4ADFA
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 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 CE/P4ADFA Bearing Product Overview & Core Advantages
The 71913 CE/P4ADFA is a super-precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and rigidity. Operating under the P4A tolerance class, it guarantees minimal runout and vibration. Its duplex face-to-face (DF) matched arrangement provides superior stability and is preloaded to Extra Light (Class A) specifications, making it ideal for managing combined radial and axial loads in high-speed, high-precision environments. The use of a phenolic resin cage contributes to its smooth operation at the specified limiting speed.
71913 CE/P4ADFA Bearing Model Code Explained, Specifications & Naming Convention
The model number 71913 CE/P4ADFA is decoded as follows:
- 71913: Basic bearing series, indicating a super-precision, 65mm bore, 90mm OD design.
- C: Denotes a 15° contact angle, optimized for high-speed applications.
- E: Indicates optimized internal geometry for enhanced performance.
- P4A: Specifies the tolerance class, signifying extremely high precision levels for both dimensions and running accuracy.
- DF: Identifies the bearing as part of a Duplex Face-to-Face preloaded pair.
- A: Specifies the preload level as Extra Light (Class A).
71913 CE/P4ADFA Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The duplex face-to-face (DF) arrangement of two bearings creates a highly rigid system capable of withstanding significant combined loads from multiple directions, ensuring precise shaft positioning.
- Super-Precision Performance: Manufactured to P4A tolerance class standards, this bearing delivers exceptional running accuracy, low noise, and minimal heat generation, which is critical for high-speed spindles.
- Optimized High-Speed Operation: The lightweight phenolic resin cage ensures excellent dimensional stability and low friction at high rotational speeds, supporting the bearing's high limiting speed.
- Premium Material Construction: Manufactured from high-grade chrome steel for both rings and balls, ensuring long-term durability and consistent performance under demanding conditions.
71913 CE/P4ADFA Bearing Typical Application Areas
This bearing is engineered for the most demanding precision machinery, including:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Grinding Spindles: Applications requiring the ultimate in rotational accuracy.
- High-Frequency Machining Centers
- Other Precision Rotary Equipment where minimal runout and high rigidity are paramount.
