S71911 ACE/P4A
Sealed Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
S71911 ACE/P4A
Basic Information
System of measurement
Metric
Weight
0.17 kg
Tolerance class
P4 (ABEC-7)
Seal type
Sealed
For load direction
Angular Contact
Main Dimensions
Bore diameter
55 mm
Bore diameter tolerance
-0.007mm to 0
Outside diameter
80 mm
Outside diameter tolerance
-0.007mm to 0
Width
13 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
7.938 mm
Ball quantity
21
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
3330 lbf
Radial static load rating
2250 lbf
Limiting speed
21 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Single
Preload
Available
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:
$ 575.05
/ each
In Stock
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S71911 ACE/P4A Bearing Product Overview & Core Advantages
The S71911 ACE/P4A is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional rotational accuracy and rigidity. This sealed bearing features a phenolic cage and comes pre-lubricated, offering a complete, ready-to-install solution. Its key advantage lies in its ability to accommodate combined loads (radial and axial) simultaneously, making it ideal for high-speed spindles and other precision machinery where high rigidity and operational reliability are paramount.
Model Code Breakdown
| Code Segment | Interpretation | Technical Significance |
|---|---|---|
| S71911 | Basic Model | Denotes a precision angular contact ball bearing series with a 55mm bore, 80mm OD, and 13mm width. |
| ACE | Contact Angle & High Precision | Indicates a 25° contact angle and a P4 (ABEC-7) tolerance class, ensuring superior running accuracy. |
| P4A | Preload | Specifies that the bearing is supplied with a light preload, enhancing system rigidity and minimizing axial and radial runout. |
S71911 ACE/P4A Bearing Structural Features & Performance Benefits
- High Rigidity and Load Capacity: The angular contact design with a 25° contact angle and preload provides excellent resistance to deflection, enabling the bearing to handle significant combined loads.
- High-Speed Performance: The lightweight phenolic cage minimizes centrifugal forces, contributing to a high limiting speed of 21,000 rpm. This makes it a true high-speed bearing.
- Sealed and Lubricated for Long Life: As a sealed bearing, it is protected from contamination. Being pre-lubricated, it is maintenance-free and ensures consistent performance within its specified temperature range of -30°C to 110°C.
- Precision Engineering: Manufactured to P4 (ABEC-7) tolerance standards with chrome steel rings and balls, this bearing guarantees smooth, quiet, and precise operation.
S71911 ACE/P4A Bearing Typical Application Areas
This bearing is engineered for high-performance applications, including:
- Machine Tool Spindles: For CNC machining centers, grinders, and lathes requiring high speed and precision.
- High-Speed Motors and Spindles: Used in applications where minimal runout and high rotational accuracy are critical.
- Precision Instrumentation: Ideal for medical devices, optical scanners, and measuring equipment.
- Robotics: Provides the necessary rigidity and accuracy for robotic arm joints and servo motors.
