S71911 CB/P4A
Sealed Super Precision Angular Contact Ball Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
S71911 CB/P4A
Basic Information
System of measurement
Metric
Weight
0.19 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
5.556 mm
Ball quantity
28
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
2239 lbf
Radial static load rating
1834 lbf
Limiting speed
22 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:
$ 574.47
/ each
In Stock
- Fast delivery
- Free shipping on orders over $200
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
S71911 CB/P4A Bearing Product Overview & Core Advantages
The S71911 CB/P4A is a precision angular contact ball bearing designed for applications demanding exceptional accuracy and rigidity. As a single-row bearing with a 15° contact angle, it excels at supporting combined loads—simultaneously handling high radial forces and substantial axial loads in one direction. Manufactured to the stringent P4 (ABEC-7) tolerance class, it ensures minimal runout and superior rotational accuracy. Its compact cross-section, with a 55 mm bore and 13 mm width, makes it ideal for space-constrained, high-performance assemblies requiring high rigidity and reliable operation.
S71911 CB/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning | Significance & Benefit |
|---|---|---|
| C | 15° Contact Angle | Optimized for supporting combined radial and axial loads. |
| B | 40° Contact Angle (Note: This is a common designation, please verify against manufacturer datasheet for this specific model) | Indicates a higher contact angle for increased axial load capacity. |
| P4A | P4 Tolerance Class with specific running accuracy requirements | Guarantees ultra-precise dimensions and minimal vibration for high-speed and high-accuracy applications. |
S71911 CB/P4A Bearing Structural Features & Performance Benefits
- High Rigidity and Precision: The phenolic resin cage, combined with P4 precision grinding of the chrome steel rings and balls, ensures exceptional dimensional stability and low noise operation, which is critical for high-speed spindles.
- Superior Load Capacity: The angular contact design with a defined contact angle is engineered to handle significant combined loads (radial and axial). The high dynamic and static load ratings ensure long service life under demanding conditions.
- Optimized High-Speed Performance: The lightweight phenolic cage reduces centrifugal forces, while the high-grade chrome steel components and precision manufacturing contribute to a high limiting speed of 22,000 rpm.
- Pre-Lubricated and Sealed: The bearing comes lubricated and sealed, protecting against contamination and providing long-term, maintenance-free operation within its specified temperature range.
S71911 CB/P4A Bearing Typical Application Areas
This bearing is ideally suited for high-performance machinery where precision and speed are paramount. Key applications include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Drives: Servo motors, high-frequency spindles.
- Medical Equipment: Dental handpieces, centrifuges.
- Robotics: High-accuracy joint and arm actuators.
