71913 ACD/P4AQBCC
71900 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
71913 ACD/P4AQBCC
Basic Information
System of measurement
Metric
Weight
0.84 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
52 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
7.938 mm
Ball quantity
26
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
11700 lbf
Radial static load rating
14400 lbf
Limiting speed
36 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Quadruplex Back-to-Back (QBC)
Number of bearings in matched set
4
Universal matching bearing
No (Standard)
Preload
Moderate / Class C
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
Price available upon request.
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71913 ACD/P4AQBCC Bearing Product Overview & Core Advantages
The 71913 ACD/P4AQBCC is a high-precision quadruplex angular contact ball bearing designed for demanding applications requiring exceptional rigidity and accuracy. This P4A tolerance class bearing features a back-to-back quadruplex (QBC) arrangement, providing superior stability and the ability to handle complex combined loads (radial and axial) from multiple directions. With a moderate preload (Class C) and a 25° contact angle, it delivers optimized performance for high-speed operation up to 36,000 rpm, making it an ideal solution for ultra-precise, high-rigidity systems.
71913 ACD/P4AQBCC Bearing Model Code Explained, Specifications & Naming Convention
The model number 71913 ACD/P4AQBCC is decoded as follows:
- 71913: Basic series designation for a high-precision angular contact ball bearing.
- ACD: Signifies Angular Contact design with a 25° contact angle.
- P4A: Indicates an ultra-high precision tolerance class, exceeding standard ABEC 7/ISO P4 specifications for runout and dimensional accuracy.
- QBCC: Denotes the bearing is supplied as part of a Quadruplex Back-to-Back (QBC) matched set with Class C preload.
71913 ACD/P4AQBCC Bearing Structural Features & Performance Benefits
- Exceptional Rigidity and Stability: The quadruplex back-to-back (QBC) arrangement creates a highly rigid bearing system that effectively resists moment loads and shaft deflection, crucial for maintaining precision under heavy combined loads.
- High-Speed Capability: The lightweight phenolic cage and optimized internal geometry, combined with the 25° contact angle, enable reliable operation at the high limiting speed of 36,000 rpm.
- Superior Load Capacity: Engineered with a high dynamic load rating of 11,700 lbf and static load rating of 14,400 lbf, this bearing is built to withstand significant radial and axial forces in demanding applications.
- Precision Performance: Manufactured to P4A tolerance class with tight dimensional controls on the bore diameter, outside diameter, and width, ensuring minimal runout and consistent, high-accuracy performance.
71913 ACD/P4AQBCC Bearing Typical Application Areas
This bearing is specifically engineered for high-performance machinery where extreme precision, rigidity, and speed are paramount. Key applications include:
- High-Speed Machine Tool Spindles
- Precision Grinding Spindles
- High-Frequency Machining Centers
- Aerospace Positioning Systems
- Medical and Laboratory Equipment Spindles
