S71911 CD/P4A
Sealed Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
S71911 CD/P4A
Basic Information
System of measurement
Metric
Weight
0.18 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
15 °
Ball & Washer Dimensions
Ball diameter
7.938 mm
Ball quantity
23
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
4388 lbf
Radial static load rating
3285 lbf
Limiting speed
16 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:
$ 575.21
/ each
In Stock
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S71911 CD/P4A Bearing Product Overview & Core Advantages
The S71911 CD/P4A is a high-precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and rigidity. As a single-row bearing with a 15° contact angle, it excels at supporting combined loads, handling high radial loads alongside significant unidirectional axial loads. Manufactured to P4 (ABEC-7) tolerance class, it ensures minimal runout and vibration, making it ideal for high-speed spindles and precision machinery. Its compact cross-section and preload availability contribute to a stiff and responsive system with enhanced operational stability.
S71911 CD/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| S | Designates a bearing with a 15° contact angle. |
| 71911 | The basic bearing series, indicating a light series with a 55 mm bore, 80 mm OD, and 13 mm width. |
| CD | Signifies a specific internal design with high rigidity and optimized internal geometry for precision applications. |
| P4A | Indicates the tolerance class P4 (ABEC-7), denoting very high precision levels for dimensional and running accuracy. |
S71911 CD/P4A Bearing Structural Features & Performance Benefits
- High Rigidity and Precision: The phenolic resin cage and precision-ground chrome steel components, coupled with the P4A tolerance class, ensure minimal deflection and vibration, providing exceptional system stability and positioning accuracy.
- Superior Load Capacity: With a 15° contact angle, the bearing is engineered to support substantial combined (radial and axial) loads simultaneously, offering a radial dynamic load rating of 4388 lbf and a static rating of 3285 lbf.
- Optimized High-Speed Performance: The lightweight phenolic cage reduces centrifugal forces, while the optimized internal geometry and pre-greasing contribute to a high limiting speed of 16,000 rpm.
- Sealed and Lubricated for Life: As a sealed and lubricated unit, it is protected from contamination and is ready for immediate use, offering long service life with minimal maintenance within its specified temperature range of -30°C to 110°C.
S71911 CD/P4A Bearing Typical Application Areas
This precision bearing is ideally suited for high-performance applications, including:
- Machine Tool Spindles for milling, grinding, and turning centers
- High-Frequency Motors and precision spindles
- Industrial Pumps and compressors
- Precision Instrumentation and measuring equipment
- Robotic Arm Joints and automation systems
