71911 ACD/P4ADGB
71900 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
71911 ACD/P4ADGB
Basic Information
System of measurement
Metric
Weight
0.36 kg
Tolerance class
P4A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
55 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
80 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
23
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
6660 lbf
Radial static load rating
6188 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
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71911 ACD/P4ADGB Bearing Product Overview & Core Advantages
The 71911 ACD/P4ADGB is a precision angular contact ball bearing designed for applications demanding exceptional accuracy and rigidity. As a universal matchable (SU) bearing supplied in a preloaded pair, it delivers superior performance in handling combined radial and axial loads. Manufactured to the stringent P4A tolerance class, this bearing ensures minimal runout and high rotational accuracy, making it ideal for high-speed spindles and other precision machinery.
71911 ACD/P4ADGB Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning |
|---|---|
| ACD | Angular Contact Design with a 25° contact angle, optimized for high axial load capacity. |
| P4A | Indicates a high-precision tolerance class with very tight dimensional and running accuracy limits. |
| DGB | Signifies a Universal Matchable (SU) pair with Light Preload (Class B), ready for installation without further adjustment. |
71911 ACD/P4ADGB Bearing Structural Features & Performance Benefits
- High Rigidity and Load Capacity: The angular contact design with a 25° contact angle and the use of a matched pair provide exceptional stiffness, enabling the bearing to withstand significant combined loads.
- Precision and High-Speed Performance: Manufactured to P4A tolerance standards and featuring a lightweight phenolic cage, the bearing achieves a high limiting speed of 34,000 rpm, ensuring smooth operation and minimal vibration.
- Optimized for Precision Assembly: The universal matchable (SU) characteristic allows any two bearings to be paired without selective matching, simplifying inventory and assembly while maintaining high performance.
- Durable Material Construction: Components made from chrome steel for both rings and balls ensure high fatigue life and durability under demanding operating conditions.
71911 ACD/P4ADGB Bearing Typical Application Areas
The 71911 ACD/P4ADGB is engineered for high-performance applications, including:
- Machine Tool Spindles (e.g., CNC machining centers, grinding spindles)
- High-Speed Precision Drives
- Industrial Pumps and Compressors
- Robotic Arm Joints and Precision Gearboxes
