71916 ACD/P4AQBCD
71900 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
71916 ACD/P4AQBCD
Basic Information
System of measurement
Metric
Weight
1.48 kg
Tolerance class
P4A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
80 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
110 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
27
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
20340 lbf
Radial static load rating
32850 lbf
Limiting speed
17 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
Heavy / Class D
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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71916 ACD/P4AQBCD Bearing Product Overview & Core Advantages
The 71916 ACD/P4AQBCD is a precision angular contact ball bearing designed for demanding applications requiring exceptional rigidity and load capacity. This quadruplex matched set, arranged in a back-to-back (QBC) configuration, is engineered to handle combined radial and axial loads simultaneously. Manufactured to a P4A tolerance class and featuring a heavy preload (Class D), it delivers superior rotational accuracy, high system stiffness, and reliable performance in high-precision machinery. Its open design and phenolic cage contribute to its high-speed capabilities.
71916 ACD/P4AQBCD Bearing Model Code Explained, Specifications & Naming Convention
The model number 71916 ACD/P4AQBCD is decoded as follows:
- 71916: Basic series designation for a high-precision angular contact ball bearing.
- ACD: Signifies Angular Contact design with a 25° contact angle and a specific internal geometry.
- P4A: Denotes a very high tolerance class, ensuring extremely tight dimensional and running accuracy.
- QBC: Indicates the bearing is part of a Quadruplex Back-to-Back matched set of 4 bearings.
- D: Specifies a Heavy preload applied to the bearing set for maximum rigidity.
71916 ACD/P4AQBCD Bearing Structural Features & Performance Benefits
- Ultra-High Rigidity and Stability: The quadruplex back-to-back arrangement creates an exceptionally rigid bearing system, effectively resisting complex moment loads and minimizing shaft deflection under heavy operating conditions.
- Superior Load Capacity: With a dynamic load rating of 20,340 lbf and a static load rating of 32,850 lbf, this bearing is built to withstand significant combined loads.
- Precision High-Speed Performance: The phenolic cage offers low weight and excellent sliding properties, supporting the high limiting speed of 17,000 rpm. The 25° contact angle provides an optimal balance between radial and axial load capacity for high-speed operation.
- Precision Engineering: Manufactured to P4A tolerance standards with tight bore, outer diameter, and width tolerances, this bearing ensures precise shaft positioning and smooth, vibration-free running.
71916 ACD/P4AQBCD Bearing Typical Application Areas
This high-precision, high-rigidity bearing set is ideally suited for:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers requiring utmost accuracy and stiffness.
- Precision Gearboxes and Robotic Drives where minimal deflection under load is critical.
- High-Frequency Motors and Spindles used in PCB drilling and semiconductor manufacturing equipment.
- Medical Equipment such as high-speed dental handpieces and imaging device rotors.
- Aerospace Actuation Systems demanding reliable performance under high loads and speeds.
