71914 ACD/P4AQBCA
71900 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
71914 ACD/P4AQBCA
Basic Information
System of measurement
Metric
Weight
1.32 kg
Tolerance class
P4A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
70 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
100 mm
Outside diameter tolerance
-0.004mm to 0
Width
64 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
9.525 mm
Ball quantity
24
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
19170 lbf
Radial static load rating
29025 lbf
Limiting speed
28 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
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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71914 ACD/P4AQBCA Bearing Product Overview & Core Advantages
The 71914 ACD/P4AQBCA is a 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 arrangement (QBC), enabling it to withstand complex combined loads including significant radial and bidirectional axial forces. With its extra light preload (Class A) and optimized 25° contact angle, it delivers high running accuracy, excellent stability, and is ideally suited for high-precision, high-rigidity systems. The phenolic cage and factory lubrication contribute to its reliable performance at high speeds.
71914 ACD/P4AQBCA Bearing Model Code Explained, Specifications & Naming Convention
The model number 71914 ACD/P4AQBCA is decoded as follows:
- 71914: Basic bearing series, indicating a high-precision angular contact design with a 70mm bore, 100mm OD, and 64mm width.
- ACD: Angular Contact design with a 25° contact angle.
- P4A: High-Precision Tolerance Class, specifying extremely tight dimensional and running accuracy tolerances superior to standard ABEC 7 (P4).
- QBC: Quadruplex (4 bearings) matched set in a Back-to-Back Configuration. This arrangement provides maximum moment stiffness and stability.
71914 ACD/P4AQBCA Bearing Structural Features & Performance Benefits
- Exceptional Rigidity & Load Capacity: The quadruplex back-to-back arrangement (QBC) creates a highly rigid bearing system capable of supporting heavy combined radial and axial loads and resisting moment loads effectively. The extra light preload ensures precise shaft positioning without excessive friction or heat generation.
- High-Speed Capability: The lightweight and robust phenolic resin cage ensures smooth operation and guidance of the balls at the high limiting speed of 28,000 rpm. The phenolic material offers excellent strength-to-weight ratio and operates well under high centrifugal forces.
- Precision Performance: Manufactured to P4A tolerance class, this bearing guarantees minimal runout and vibration, which is critical for applications requiring ultra-high rotational accuracy.
- Durable Construction: Components made from chrome steel provide high load ratings (19,170 lbf dynamic, 29,025 lbf static) and long service life under demanding conditions.
71914 ACD/P4AQBCA Bearing Typical Application Areas
This bearing is engineered for high-performance machinery where precision, speed, and rigidity are paramount. Key applications include:
- High-Speed Machine Tool Spindles
- Precision Grinding Spindles
- High-Frequency Machining Centers
- Advanced Robotics and Automation Systems
- Aerospace Actuation and Control Systems
