71912 ACDGC/P4A
71900 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
71912 ACDGC/P4A
Basic Information
System of measurement
Metric
Weight
0.19 kg
Tolerance class
P4A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
60 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
85 mm
Outside diameter tolerance
-0.004mm 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°C to 110 °C
Radial dynamic load rating
4185 lbf
Radial static load rating
3285 lbf
Limiting speed
33 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Single
Number of bearings in matched set
3
Universal matching bearing
Universal Matchable (SU)
Preload
Moderate / Class C
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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71912 ACDGC/P4A Bearing Product Overview & Core Advantages
The 71912 ACDGC/P4A is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and rigidity. Engineered to a P4A tolerance class, this bearing excels in high-speed scenarios while accommodating combined radial and axial loads. Its single-row design with a 25° contact angle and moderate preload (Class C) ensures smooth operation and precise shaft positioning. Manufactured from high-grade chrome steel and featuring a lightweight phenolic cage, it offers superior performance and reliability in precision machinery.
71912 ACDGC/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning |
|---|---|
| AC | Angular Contact design with a 25° contact angle. |
| DGC | Designates specific internal geometry and contact angle optimization. |
| P4A | Indicates a super-precision tolerance class with enhanced running accuracy and dimensional stability. |
71912 ACDGC/P4A Bearing Structural Features & Performance Benefits
- High Rigidity and Precision: The P4A tolerance class ensures minimal runout and precise rotational accuracy, which is critical for applications like machine tool spindles. The moderate preload eliminates internal clearance, enhancing system stiffness and reducing vibration.
- Superior Load Capacity: With a 25° contact angle, this angular contact bearing is optimized to handle significant combined loads (radial and axial loads acting simultaneously). Its dynamic load rating of 4185 lbf ensures long service life under demanding conditions.
- Optimized High-Speed Performance: The lightweight phenolic cage reduces centrifugal forces, allowing for a high limiting speed of 33,000 rpm. This makes it an ideal high-speed bearing for precision equipment.
- Universal Matching Capability (SU): This bearing is universally matchable, meaning multiple bearings can be mounted in a set (typically 3) in various configurations (back-to-back, face-to-face, or tandem) to achieve specific stiffness and load-sharing characteristics without selective assembly.
71912 ACDGC/P4A Bearing Typical Application Areas
- Machine Tool Spindles: High-precision machining centers, grinding spindles, and lathes.
- High-Speed Motors and Spindles: Electric motors, CNC router spindles, and dental handpieces.
- Precision Instrumentation: Measuring equipment, optical scanners, and coordinate measuring machines (CMM).
- Aerospace and Defense Systems: Gyroscopes, radar equipment, and navigation systems.
