S7011 CB/P4A
Sealed Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
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S7011 CB/P4A Bearing Product Overview & Core Advantages
The S7011 CB/P4A is a precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and rigidity. As a single-row bearing with P4 (ABEC-7) tolerance class, it delivers superior running precision. Its key advantage lies in its ability to accommodate combined loads, efficiently handling both radial and substantial one-directional axial loads simultaneously. The 15° contact angle is optimized for high-speed operation, while the preload availability ensures minimal axial and radial play, resulting in high system stiffness and precise shaft positioning. This makes it an ideal choice for high-precision, high-reliability applications where performance is critical.
S7011 CB/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning | Significance & Advantage |
|---|---|---|
| C | 15° Contact Angle | Optimized for high-speed performance and efficient axial load carrying capacity. |
| B | 40° Contact Angle (Standard for this series designation) | Provides a higher axial rigidity compared to a 15° design. |
| P4A | P4 Tolerance Class (ABEC-7), specific accuracy grade | Guarantees extremely tight dimensional and running accuracy for precision applications, reducing vibration and noise. |
S7011 CB/P4A Bearing Structural Features & Performance Benefits
- High Rigidity and Precision: The single-row design with a phenolic resin cage and P4 tolerance class ensures exceptional dimensional stability and rotational accuracy, which is critical for minimizing deflection under load.
- Superior Load Capacity: Engineered with a high-grade chrome steel construction and 26 precision balls, this bearing offers a dynamic load rating of 3150 lbf and a static load rating of 2475 lbf, enabling reliable performance under significant combined radial and axial loads.
- Optimized High-Speed Performance: The phenolic cage is lightweight and possesses excellent sliding properties, contributing to lower friction and enabling a high limiting speed of 22,000 rpm. The 15° contact angle further enhances its suitability for high-speed operation.
- Sealed and Lubricated for Life: As a sealed and pre-lubricated unit, it is protected from contamination and is designed for long-term, maintenance-free operation within its specified temperature range of -30°C to 110°C.
S7011 CB/P4A Bearing Typical Application Areas
- Machine Tool Spindles: For high-speed milling, grinding, and turning centers.
- Precision Gearboxes: Especially in high-speed transmission systems.
- Industrial Pumps and Compressors: Where reliable operation under combined loads is essential.
- High-Frequency Spindles: Used in PCB drilling and other micro-machining applications.
- Robotics and Automation: In high-accuracy rotary joints and arm assemblies.
