71914 ACD/P4ADBD
71900 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
71914 ACD/P4ADBD
Basic Information
System of measurement
Metric
Weight
0.66 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
32 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
11858 lbf
Radial static load rating
14400 lbf
Limiting speed
28 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Duplex Back-to-Back (DB)
Number of bearings in matched set
2
Universal matching bearing
No (Standard)
Preload
Heavy / Class D
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Phenolic
Technical Drawings
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In Stock
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71914 ACD/P4ADBD Bearing Product Overview & Core Advantages
The 71914 ACD/P4ADBD is a precision duplex angular contact ball bearing designed for demanding applications requiring exceptional rigidity and accuracy. This back-to-back (DB) matched set features a heavy preload (Class D), enabling it to withstand significant combined loads—both radial and axial—while maintaining high rotational precision. Manufactured to the stringent P4A tolerance class, it offers superior running accuracy and is pre-lubricated for immediate use, making it an ideal choice for high-performance machinery where high rigidity and reliability are paramount.
71914 ACD/P4ADBD Bearing Model Code Explained, Specifications & Naming Convention
The model number 71914 ACD/P4ADBD is decoded as follows:
- 71914: Basic bearing series, indicating a high-precision angular contact design with a 70mm bore, 100mm OD, and 32mm width.
- ACD: Signifies the bearing is a Duplex set arranged in a Back-to-Back (DB) configuration.
- P4A: Denotes the tolerance class, specifying very high precision levels for both dimensional and running accuracy.
- DB: Confirms the Back-to-Back mounting arrangement, which provides high moment rigidity.
- Open (Seal type): The bearing is unsealed, optimized for controlled environments and often used with external lubrication systems.
- Heavy Preload (Class D): Indicates a significant internal preload is applied, maximizing system stiffness.
71914 ACD/P4ADBD Bearing Structural Features & Performance Benefits
- High Rigidity & Stability: The back-to-back duplex design creates a widely spaced load zone, significantly increasing the bearing's resistance to moment loads and enhancing overall system stiffness. The applied heavy preload further eliminates internal clearance, ensuring precise shaft positioning even under heavy combined loads.
- Superior Load Capacity: With a 25° contact angle and a dynamic load rating of 11858 lbf, this bearing is engineered to handle substantial radial and bidirectional axial loads simultaneously, making it suitable for applications with complex loading conditions.
- Precision & High-Speed Capability: Built to P4A tolerance class standards, it guarantees minimal runout and vibration. The phenolic resin cage is lightweight and robust, contributing to smooth operation at high speeds, with a limiting speed of 28,000 rpm.
- Optimized Material Selection: Components made from chrome steel for both rings and balls provide high wear resistance and durability. The standard lubrication ensures immediate operational readiness within a temperature range of -30°C to 110°C.
71914 ACD/P4ADBD Bearing Typical Application Areas
This bearing is specifically designed for high-precision, high-rigidity applications, including:
- Machine Tool Spindles: For milling, grinding, and turning centers requiring extreme accuracy and stiffness.
- Precision Gearboxes: In industrial automation and robotics where backlash must be minimized.
- High-Frequency Spindles: Used in PCB drilling and high-speed routing equipment.
- Medical Equipment: In advanced imaging systems and surgical tools demanding smooth, precise rotation.
- Aerospace Actuation Systems: For control surfaces and other mechanisms requiring reliable performance under load.
