71913 ACB/P4A
71900 Series Super Precision Angular Contact Ball Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
71913 ACB/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
25 °
Ball & Washer Dimensions
Ball diameter
5.556 mm
Ball quantity
32
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
2239 lbf
Radial static load rating
1980 lbf
Limiting speed
28 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 ACB/P4A Bearing Product Overview & Core Advantages
The 71913 ACB/P4A is a high-precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and rigidity. This single-row bearing is supplied with a preload, ensuring minimal axial and radial play for superior system stability. Its key advantages include a high limiting speed and the ability to accommodate combined loads, making it an ideal choice for high-performance spindles and precision machinery where high rigidity and operational reliability are paramount.
Model Code Breakdown
| Code Segment | Technical Meaning |
|---|---|
| 71913 | Basic bearing series and size designation (65mm bore, 90mm OD, 13mm width). |
| AC | Angular Contact design with a 25° contact angle. |
| B | Indicates a 40° contact angle. (Note: This may be a special designation; the provided specification lists a 25° angle. Please verify application requirements). |
| P4A | Specifies the P4 (ABEC-7) tolerance class for ultra-precision operation, with the "A" suffix potentially indicating specific preload or accuracy grouping. |
71913 ACB/P4A Bearing Structural Features & Performance Benefits
- High Rigidity and Precision: Manufactured to P4 tolerance class with a phenolic resin cage, this bearing ensures exceptional dimensional stability and smooth operation at high speeds, contributing to superior system rigidity.
- Optimized Load Capacity: The 25° contact angle is engineered to support significant combined radial and axial loads simultaneously, a critical feature for precision spindles.
- High-Speed Performance: The lightweight phenolic cage and optimized internal geometry enable a high limiting speed of 28,000 rpm, making it suitable for demanding high-speed applications.
- Pre-lubricated and Ready-to-Use: The bearing is factory-lubricated, ensuring immediate operational readiness and reliable performance within its specified temperature range.
71913 ACB/P4A Bearing Typical Application Areas
This precision angular contact ball bearing is ideally suited for:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling, high-frequency motor spindles.
- Robotics: High-accuracy joints and rotary actuators.
- Medical Equipment: Dental handpieces and laboratory centrifuges.
- Aviation & Aerospace: Gyroscopes and navigation instruments.
