71812 ACDGA/P4
71800 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
71812 ACDGA/P4
Basic Information
System of measurement
Metric
Weight
0.1 kg
Tolerance class
P4
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
60 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
78 mm
Outside diameter tolerance
-0.004mm to 0
Width
10 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
5.556 mm
Ball quantity
28
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
2858 lbf
Radial static load rating
3015 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
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:
$ 96.68
/ each
In Stock
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71812 ACDGA/P4 Bearing Product Overview & Core Advantages
The 71812 ACDGA/P4 is a precision angular contact ball bearing designed for applications demanding exceptional accuracy and reliability. As a single bearing with P4 tolerance class, it offers superior running accuracy. Its design is optimized to support combined loads, efficiently handling radial loads and axial loads in one direction. The bearing features a phenolic cage and is pre-lubricated, contributing to its high-speed capability and smooth operation. Its compact cross-section and extra light preload (Class A) make it ideal for high-precision spindles and other precision machinery.
71812 ACDGA/P4 Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71812 | Basic bearing series and size designation (60mm bore, 78mm OD, 10mm width) |
| AC | Angular Contact design with a 25° contact angle |
| DG | Universal Matchable (SU) bearing, designed to be mounted in sets (3 bearings in a matched set) |
| A | Signifies Extra light preload / Class A |
| /P4 | Indicates a high-precision tolerance class for superior running accuracy |
71812 ACDGA/P4 Bearing Structural Features & Performance Benefits
- High Rigidity and Precision: Manufactured to P4 tolerance class with tight dimensional tolerances on the bore, outside diameter, and width, ensuring high system rigidity and precise rotational accuracy.
- Optimized Load Capacity: The 25° contact angle is engineered to support significant combined loads, making it highly effective for applications with simultaneous radial and axial forces.
- Superior High-Speed Performance: The lightweight phenolic cage and optimized internal geometry contribute to lower friction and enable a high limiting speed of 33,000 rpm, which is critical for high-speed bearing applications.
- Universal Matching Capability: Designated as Universal Matchable (SU), these bearings can be mounted in sets (typically 3) in a universal arrangement to achieve pre-defined rigidity and performance characteristics, offering flexibility in system design.
71812 ACDGA/P4 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
