7011 CB/P4A
7000 Series Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
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Materials
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7011 CB/P4A Bearing Product Overview & Core Advantages
The 7011 CB/P4A is a single-row angular contact ball bearing designed for high-precision applications requiring exceptional rotational accuracy and rigidity. Engineered to a P4 (ABEC-7) tolerance class, it delivers superior running accuracy, making it ideal for demanding industrial environments. Its key advantage lies in its ability to accommodate combined loads—significant radial loads and axial loads in one direction—simultaneously. The 15° contact angle optimizes this capability, providing a balanced performance profile for high-speed operation and high system rigidity.
7011 CB/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7011 | Standard bearing series designation, indicating a metric bore diameter of 55mm, outside diameter of 90mm, and width of 18mm. |
| CB | Specifies a specific contact angle (15°) and internal design for optimized axial load capacity and rigidity. |
| P4A | Indicates a high-precision tolerance class (P4 / ABEC-7) with enhanced dimensional and running accuracy requirements. |
7011 CB/P4A Bearing Structural Features & Performance Benefits
High Rigidity & Precision: Manufactured to P4 tolerance with tight dimensional controls on the bore, outside diameter, and width, this bearing ensures minimal runout and vibration, contributing directly to high system rigidity and precision.
Optimized Load Capacity: The 15° contact angle and robust construction using chrome steel rings and balls provide an excellent radial dynamic load rating of 3150 lbf and the ability to handle significant one-direction axial loads in combination with radial loads.
High-Speed Performance: The lightweight, durable phenolic resin cage guides the 26 high-grade steel balls effectively, reducing friction and centrifugal forces. This, combined with the optimized internal geometry, supports a high limiting speed of 32,000 rpm.
Pre-Lubricated & Ready-to-Install: The bearing is supplied lubricated, ensuring immediate operational readiness and protection during the initial run-in period.
7011 CB/P4A Bearing Typical Application Areas
The 7011 CB/P4A is engineered for high-performance machinery where precision, speed, and reliability are paramount. Typical applications include:
- Machine Tool Spindles
- High-Frequency Motors
- Precision Grinding Spindles
- High-Speed Pumps and Compressors
- Robotic Arm Joints and Drives
