7011 CB/HCP4A
Hybrid Ceramic Super Precision Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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7011 CB/HCP4A Bearing Product Overview & Core Advantages
The 7011 CB/HCP4A is a precision angular contact ball bearing designed for applications demanding exceptional accuracy and high-speed performance. As a single-row bearing, it is engineered to accommodate high combined loads, primarily thrust loads in one direction, with a 15° contact angle optimizing this capability. Its key advantages include superior running accuracy due to its P4 (ABEC-7) tolerance class, high-speed capability enabled by a lightweight phenolic cage and ceramic balls, and the availability of preload for enhanced system rigidity. This bearing is pre-lubricated for immediate operation and is ideal for high-reliability, high-precision machinery.
7011 CB/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning | Advantage |
|---|---|---|
| CB | Specific internal design and clearance for preload. | Ensures precise shaft positioning and high system rigidity. |
| HC | Hybrid Ceramic: Features ceramic balls. | Reduces friction, increases limiting speed, and provides non-conductive properties and longer service life. |
| P4 | High precision tolerance class (ABEC-7). | Guarantees extremely low runout and vibration for superior operational accuracy. |
| A | Denotes a 30° contact angle (Note: This bearing has a 15° angle, "A" may refer to a specific internal design variant). | Optimized for specific load conditions and stiffness requirements. |
7011 CB/HCP4A Bearing Structural Features & Performance Benefits
- Hybrid Ceramic Construction: The combination of chrome steel rings and silicon nitride (Si3N4) ceramic balls significantly reduces friction and heat generation. This directly contributes to a higher limiting speed of 40,000 rpm, reduced wear, and extended lubrication life.
- High-Precision & Rigidity: Manufactured to a P4 tolerance class with tight dimensional tolerances on the bore diameter (55 mm) and outside diameter (90 mm). The 15° contact angle and availability of preload provide high axial and radial stiffness, minimizing deflection under load.
- Optimized High-Speed Cage: The phenolic cage is lightweight and possesses excellent sliding properties, making it ideal for high-speed operation. It contributes to lower centrifugal forces and stable performance at the maximum rotational speed.
- Superior Load Capacity: With a dynamic load rating of 3150 lbf and a static load rating of 2475 lbf, this bearing is capable of handling significant combined loads in demanding applications.
7011 CB/HCP4A Bearing Typical Application Areas
The 7011 CB/HCP4A is engineered for high-performance applications where speed, precision, and reliability are critical. Key industries and equipment include:
- Machine Tool Spindles: High-speed milling, grinding, and drilling spindles.
- Precision Robotics: Arm joints and high-accuracy servo motors.
- Aerospace & Defense Systems: Gyroscopes, navigation systems, and auxiliary power units.
- High-Frequency Motors and Spindles for PCB drilling and semiconductor manufacturing.
