7011 ACD/P4ATBTC
7000 Series Super Precision Angular Contact Ball Bearings
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7011 ACD/P4ATBTC Bearing Product Overview & Core Advantages
The 7011 ACD/P4ATBTC is a precision angular contact ball bearing designed for demanding applications requiring exceptional rigidity and accuracy. This bearing is supplied as a matched triplex set in a Back-to-Back (TBT) arrangement, providing superior stability and moment load capacity. Engineered to a P4A tolerance class, it ensures minimal runout and consistent high-speed performance. Its key advantages include the ability to handle combined loads (radial and axial), high operational stiffness from its preloaded configuration, and reliable performance in precision spindles and machine tools.
7011 ACD/P4ATBTC Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning |
|---|---|
| ACD | Angular Contact Design with a 25° contact angle, optimized for carrying significant axial loads. |
| P4A | Indicates a high precision tolerance class with tight dimensional and running accuracy limits. |
| TBT | Specifies a Triplex Back-to-Back matched set arrangement of three bearings. |
| C | Denotes a Moderate Preload (Class C), which provides increased rigidity for the bearing system. |
7011 ACD/P4ATBTC Bearing Structural Features & Performance Benefits
- High Rigidity & Stability: The triplex back-to-back arrangement creates a highly rigid bearing system that effectively resists moment loads and shaft deflection, making it ideal for precision machining applications.
- Superior Load Capacity: The 25° contact angle and robust construction enable the bearing to handle significant combined radial and axial loads simultaneously.
- High-Speed Performance: The lightweight phenolic resin cage reduces centrifugal forces, contributing to a high limiting speed of 34,000 rpm. The open design facilitates efficient lubrication and heat dissipation.
- Precision Operation: Manufactured to P4A tolerance class with tight dimensional controls on the bore diameter, outside diameter, and width, ensuring smooth, quiet, and accurate rotation.
- Durable Construction: Components made from chrome steel provide excellent wear resistance and long service life under demanding conditions.
7011 ACD/P4ATBTC Bearing Typical Application Areas
The 7011 ACD/P4ATBTC is engineered for high-performance applications where precision, speed, and rigidity are paramount. Typical uses include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: Applications in PCB drilling, engraving, and high-frequency motors.
- Industrial Pumps & Compressors: Where reliable operation under combined loads is required.
- Robotics and Automation: High-accuracy rotary joints and arm axes.
