71914 CD/P4AQBCB
71900 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
71914 CD/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
15 °
Ball & Washer Dimensions
Ball diameter
9.525 mm
Ball quantity
24
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
20340 lbf
Radial static load rating
30825 lbf
Limiting speed
24 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 CD/P4AQBCB Bearing Product Overview & Core Advantages
The 71914 CD/P4AQBCB is a precision angular contact ball bearing designed for demanding applications requiring exceptional rotational accuracy and rigidity. As part of a Quadruplex Back-to-Back (QBC) matched set, this bearing is engineered to handle complex combined loads, providing superior axial and radial support in a compact arrangement. Its P4A tolerance class and light preload (Class B) ensure high running accuracy and smooth operation, making it ideal for high-speed, high-precision machinery where reliability is paramount.
71914 CD/P4AQBCB Bearing Model Code Explained, Specifications & Naming Convention
The model number 71914 CD/P4AQBCB provides detailed technical specifications:
- 71914: Basic bearing series, indicating a 70mm bore, 100mm OD, and 64mm width.
- C: Represents a 15° contact angle, optimized for high-speed applications with significant axial loads.
- D: Indicates enhanced internal design for improved performance.
- P4A: Denotes a super-precision tolerance class with specific running accuracy requirements.
- QBC: Specifies the bearing is part of a Quadruplex Back-to-Back matched set of 4 bearings.
- B: Indicates Light Preload (Class B) for reduced deflection and enhanced system rigidity.
71914 CD/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 radial and axial loads from multiple directions, ensuring minimal shaft deflection under operational stresses.
- High-Speed Performance: Featuring a phenolic resin cage and a 15° contact angle, this bearing achieves a high limiting speed of 24,000 rpm. The lightweight cage reduces centrifugal forces, while the optimized contact angle minimizes heat generation at high velocities.
- Precision Operation: Manufactured to P4A super-precision tolerances with a light preload, this bearing delivers exceptional running accuracy, low vibration, and consistent performance essential for precision spindles and machining centers.
- Durability & Reliability: Constructed from chrome steel for both rings and balls, the bearing offers high fatigue resistance and long service life. The open design allows for effective lubrication management within the specified temperature range of -30°C to 110°C.
71914 CD/P4AQBCB Bearing Typical Application Areas
This high-precision bearing is specifically designed for advanced industrial applications, including:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers requiring extreme accuracy and rigidity.
- Precision Gearboxes: Industrial transmissions and reducers where precise shaft positioning is critical.
- High-Frequency Motors: Spindles for CNC machining and other high-RPM motor applications.
- Aerospace & Defense Systems: Gyroscopes, radar systems, and other precision instrumentation.
- Medical Equipment: High-speed dental handpieces and imaging device rotors.
