71811 ACD/P4DGB
71800 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
71811 ACD/P4DGB
Basic Information
System of measurement
Metric
Weight
0.16 kg
Tolerance class
P4
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
55 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
72 mm
Outside diameter tolerance
-0.004mm to 0
Width
18 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
4.762 mm
Ball quantity
29
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
3510 lbf
Radial static load rating
4590 lbf
Limiting speed
34 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Universal Matchable (SU)
Number of bearings in matched set
2
Universal matching bearing
Universal Matchable (SU)
Preload
Light / Class B
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
Price available upon request.
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71811 ACD/P4DGB Bearing Product Overview & Core Advantages
The 71811 ACD/P4DGB is a precision angular contact ball bearing designed for applications requiring exceptional rotational accuracy and rigidity. Manufactured to P4 tolerance class, this bearing delivers superior performance in high-speed and high-precision environments. Its universal matchable (SU) design allows for flexible mounting arrangements, enabling it to accommodate combined loads efficiently. With a light preload (Class B), it ensures minimal deflection and smooth operation, making it ideal for demanding applications where reliability is paramount.
71811 ACD/P4DGB Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning |
|---|---|
| ACD | Angular Contact Design with a 25° contact angle, optimized for high-speed operation and axial load capacity. |
| P4 | Indicates high-precision tolerance class, ensuring minimal runout and superior dimensional accuracy. |
| DGB | Designates a universal matchable (SU) pair of bearings, pre-configured for simplified installation and optimal performance. |
71811 ACD/P4DGB Bearing Structural Features & Performance Benefits
- High Rigidity & Precision: The angular contact design with a 25° contact angle and P4 tolerance provides exceptional stiffness and rotational accuracy, critical for minimizing deflection under load.
- Superior Load Capacity: Engineered to handle significant combined radial and axial loads, making it suitable for complex loading conditions.
- Optimized High-Speed Performance: The phenolic cage reduces friction and weight, contributing to a high limiting speed of 34,000 rpm. The light preload further enhances high-speed stability.
- Universal Matching Capability: The SU designation means these bearings are supplied as a matched pair, simplifying mounting and ensuring pre-defined axial play and optimal load distribution.
- Durable Construction: Manufactured from chrome steel for both rings and balls, ensuring high durability and long service life in demanding environments.
71811 ACD/P4DGB Bearing Typical Application Areas
- Machine Tool Spindles
- High-Speed Precision Grinders
- Industrial Pumps and Compressors
- Robotic Arms and Precision Automation Equipment
- Medical and Dental Equipment Spindles
- Aerospace Control Systems
