71912 ACD/P4ADGA
71900 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
71912 ACD/P4ADGA
Basic Information
System of measurement
Metric
Weight
0.38 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
26 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
6795 lbf
Radial static load rating
6525 lbf
Limiting speed
33 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Universal Matchable (SU)
Number of bearings in matched set
2
Universal matching bearing
Universal Matchable (SU)
Preload
Extra light / Class A
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:
$ 266.65
/ each
In Stock
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71912 ACD/P4ADGA Bearing Product Overview & Core Advantages
The 71912 ACD/P4ADGA is a precision angular contact ball bearing designed for applications demanding exceptional accuracy and reliability. As a universal matchable (SU) bearing, it can be mounted in pairs to handle combined loads efficiently, supporting significant radial loads and axial loads in one direction. Manufactured to P4A tolerance class, it offers superior dimensional stability and running accuracy. Its extra light preload (Class A) ensures smooth, low-friction operation, making it ideal for high-speed applications with a limiting speed of 33,000 rpm. The combination of a phenolic cage and chrome steel components provides an optimal balance of strength, thermal stability, and performance.
71912 ACD/P4ADGA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71912 | Basic bearing designation, indicating a metric angular contact ball bearing with a 60 mm bore, 85 mm OD, and 26 mm width. |
| AC | Angular Contact design with a 25° contact angle. |
| D | Signifies a universal matchable (SU) design, allowing two bearings to be mounted in any combination (face-to-face, back-to-back, or tandem). |
| P4A | Indicates a high-precision tolerance class, exceeding standard ABEC-7/ISO P4 levels, ensuring extremely tight dimensional and running accuracy. |
| DGA | Specifies the extra light preload (Class A), which minimizes friction and heat generation, optimizing performance for high-speed operation. |
71912 ACD/P4ADGA Bearing Structural Features & Performance Benefits
- High Rigidity and Load Capacity: The angular contact design with a 25° contact angle and robust construction enables the bearing to support high combined radial and axial loads simultaneously.
- Superior High-Speed Performance: The lightweight phenolic cage reduces centrifugal forces, while the extra light preload minimizes friction. This combination allows for a high limiting speed of 33,000 rpm.
- Precision Engineering: Manufactured to P4A tolerance class with tight bore, OD, and width tolerances, this bearing ensures minimal runout and vibration for applications requiring extreme accuracy.
- Universal Matchability (SU): The universal matchable design provides exceptional mounting flexibility. Two bearings can be paired to create a pre-loaded set capable of handling complex load conditions and moments.
- Durable Material Construction: Components made from chrome steel offer high hardness and wear resistance, ensuring long service life under demanding conditions.
71912 ACD/P4ADGA Bearing Typical Application Areas
- Machine Tool Spindles: High-precision milling, grinding, and turning centers.
- High-Speed Spindles: For PCB drilling, dental handpieces, and small precision machining.
- Precision Instrumentation: Measuring devices, optical scanners, and laboratory equipment.
- Robotics: High-accuracy joints and arm assemblies.
- Aerospace Actuation Systems: Control surface mechanisms and auxiliary drives.
