71914 ACD/P4AQBCB
71900 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
71914 ACD/P4AQBCB
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
Light / Class B
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/P4AQBCB Bearing Product Overview & Core Advantages
The 71914 ACD/P4AQBCB is a precision angular contact ball bearing designed for the most demanding applications. This P4A tolerance class quadruplex matched set, arranged in a Back-to-Back (QBC) configuration, delivers exceptional system rigidity and rotational accuracy. Its core advantage lies in its ability to handle combined loads (radial and axial) simultaneously with high precision, making it ideal for high-speed spindles and other machinery requiring superior running accuracy and minimal deflection under load.
71914 ACD/P4AQBCB Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71914 | Basic bearing designation, indicating a high-precision angular contact bearing series with a 70 mm bore, 100 mm OD, and 64 mm width. |
| ACD | Signifies a 25° contact angle, optimized for supporting high axial loads. |
| P4A | Denotes an ultra-precision tolerance class with enhanced running accuracy requirements, superior to standard P4. |
| QBC | Indicates a Quadruplex Back-to-Back matched set of four bearings, providing maximum system rigidity. |
| B | Specifies a Light preload (Class B) applied to the matched set, eliminating internal clearance for precise shaft positioning and reduced vibration. |
71914 ACD/P4AQBCB Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The Quadruplex Back-to-Back (QBC) arrangement creates an extremely rigid bearing system, capable of withstanding heavy combined loads and complex moment loads with minimal elastic deformation.
- Precision Performance: Manufactured to P4A tolerance class with a 25° contact angle, this bearing ensures exceptional running accuracy, low noise, and minimal heat generation, which is critical for high-precision applications.
- Optimized High-Speed Capability: The phenolic cage is lightweight and robust, offering low friction and excellent performance at the high limiting speed of 28,000 rpm. The open design facilitates efficient lubrication and cooling.
- Durability and Reliability: Constructed from chrome steel for both rings and balls, the bearing provides high fatigue life and wear resistance. The matched set is supplied lubricated and ready for installation.
71914 ACD/P4AQBCB Bearing Typical Application Areas
This bearing is engineered for high-performance machinery where precision, speed, and rigidity are paramount. Key applications include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling machines, high-frequency motor spindles.
- Robotics: High-accuracy robotic arm joints and rotary units.
- Aerospace & Defense: Gyroscopes, radar systems, and other precision instrumentation.
