71912 ACD/P4A
71900 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
71912 ACD/P4A
Basic Information
System of measurement
Metric
Weight
0.19 kg
Tolerance class
P4 (ABEC-7)
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
60 mm
Bore diameter tolerance
-0.007mm to 0
Outside diameter
85 mm
Outside diameter tolerance
-0.008mm to 0
Width
13 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
7.938 mm
Ball quantity
24
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
4185 lbf
Radial static load rating
3285 lbf
Limiting speed
22 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Single
Preload
Available
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Phenolic
Technical Drawings
No drawings available at the moment, will be launched soon
Price:
$ 124.49
/ each
In Stock
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71912 ACD/P4A Bearing Product Overview & Core Advantages
The 71912 ACD/P4A is a high-precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and rigidity. Engineered to a P4 (ABEC-7) tolerance class, it is optimized to handle combined loads, accommodating significant axial loads in one direction alongside radial loads. Its compact cross-section, defined by a 60 mm bore, 85 mm outside diameter, and a narrow 13 mm width, makes it an ideal solution for space-constrained, high-speed spindle assemblies and other precision machinery where reliability and performance are critical.
71912 ACD/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71912 | Basic bearing series and size designation. |
| AC | Angular Contact design with a 25° contact angle. |
| D | Signifies a high rigid design with enhanced internal geometry. |
| P4A | Denotes a P4 (ABEC-7) tolerance class with specific running accuracy requirements. |
71912 ACD/P4A Bearing Structural Features & Performance Benefits
- High Rigidity and Load Capacity: The angular contact design and optimized internal construction provide superior stiffness, enabling the bearing to handle high combined loads effectively. The 25° contact angle is specifically chosen for excellent axial load carrying capacity.
- Precision High-Speed Performance: The phenolic resin cage ensures low friction, low weight, and excellent acceleration characteristics, contributing to a high limiting speed of 22,000 rpm. The P4 precision grade minimizes vibration and heat generation at high rotational speeds.
- Optimized for Preload: This bearing is supplied with a preload, which eliminates internal clearance. This increases system rigidity, improves rotational accuracy, and extends bearing life in precision applications.
- Material Quality: Manufactured from chrome steel for both rings and balls, ensuring high durability, wear resistance, and long service life under demanding operating conditions.
71912 ACD/P4A Bearing Typical Application Areas
This bearing is ideally suited for high-performance applications, including:
- Machine Tool Spindles
- High-Frequency Motors
- Precision Grinding Spindles
- High-Speed Pumps and Compressors
- Aerospace Control Systems
