7011 CD/P4A
7000 Series Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
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7011 CD/P4A Bearing Product Overview & Core Advantages
The 7011 CD/P4A is a single-row angular contact ball bearing designed for applications demanding high precision and superior rotational accuracy. Manufactured to P4 (ABEC-7) tolerance class, it is ideally suited for machine tool spindles and other high-performance machinery. 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 provides an optimal balance between axial load capacity and speed capability. Supplied as preloaded and lubricated, it ensures immediate operational readiness and consistent performance, making it a reliable choice for high-rigidity, high-speed applications.
7011 CD/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Model Segment | Technical Meaning |
|---|---|
| 7011 | Basic bearing designation indicating a metric, single-row angular contact ball bearing with a 55mm bore, 90mm OD, and 18mm width. |
| CD | Indicates a specific contact angle (15°) and internal design optimized for high rigidity and precise preload. |
| P4A | Denotes the tolerance class P4 (ABEC-7) for running accuracy, with the 'A' suffix indicating specific dimensional and running accuracy tolerances. |
7011 CD/P4A Bearing Structural Features & Performance Benefits
- High Rigidity and Precision: The single-row design with a 15° contact angle and P4 precision ensures minimal runout and exceptional dimensional stability, critical for high-speed spindles.
- Superior Load Capacity: Engineered to handle combined radial and axial loads effectively. The dynamic load rating of 8932 lbf and static load rating of 7312 lbf confirm its robust performance.
- Optimized High-Speed Performance: The phenolic resin cage is lightweight and strong, contributing to lower centrifugal forces and enabling a high limiting speed of 24,000 rpm. The standard lubrication further supports stable operation at high rotational speeds.
- Precision Materials: Constructed from chrome steel for both rings and balls, providing high hardness, wear resistance, and long service life under demanding conditions.
7011 CD/P4A Bearing Typical Application Areas
The 7011 CD/P4A is specified for high-precision, high-speed rotational systems. Its primary applications include:
- Machine Tool Spindles (e.g., CNC machining centers, grinding spindles)
- High-Frequency Motors and Spindles
- Precision Grinding Equipment
- Industrial Pumps and Compressors requiring high-speed operation
- Aerospace and Defense Instrumentation
