7011 ACD/P4AQBCC
7000 Series Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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7011 ACD/P4AQBCC Bearing Product Overview & Core Advantages
The 7011 ACD/P4AQBCC is a high-precision quadruplex matched bearing set designed for the most demanding applications. This metric angular contact ball bearing is characterized by its P4A super-precision tolerance class and moderate preload (Class C). Its primary advantage lies in its matched arrangement of four bearings in a back-to-back (QBC) configuration, which provides exceptional system rigidity, high running accuracy, and the capability to support combined radial and axial loads simultaneously. This makes it an ideal solution for high-speed spindles requiring maximum stiffness and precision.
7011 ACD/P4AQBCC Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7011 | Basic bearing designation (55mm bore, 90mm OD, 18mm width per bearing) |
| ACD | Angular Contact design with a 25° contact angle |
| P4A | Super-precision tolerance class, exceeding ABEC 7/ISO P4 standards |
| QBCC | Identifies the set as a Quadruplex Back-to-Back (QBC) matched set with moderate preload (Class C) |
7011 ACD/P4AQBCC Bearing Structural Features & Performance Benefits
- Exceptional Rigidity & Load Capacity: The quadruplex back-to-back arrangement creates a highly rigid bearing system capable of withstanding heavy combined loads and moments, ensuring minimal deflection under operational stresses.
- High-Speed Capability: The phenolic cage offers low mass and excellent performance at high speeds, contributing to the bearing's limiting speed of 34,000 rpm. The optimized internal geometry further enhances high-speed stability.
- Precision Performance: Manufactured to P4A super-precision tolerances with a controlled preload, this set guarantees low noise, minimal vibration, and precise rotational accuracy essential for high-end machinery.
- Optimized Material Selection: Constructed from chrome steel for rings and balls, ensuring high durability and fatigue life. The open seal type allows for customized lubrication schemes to match specific application requirements.
7011 ACD/P4AQBCC Bearing Typical Application Areas
This precision bearing set is engineered for high-performance applications where extreme rigidity and accuracy are paramount. Key industries and equipment include:
- High-Speed Machine Tool Spindles (e.g., milling, grinding, and drilling)
- Precision Grinding Machines
- High-Frequency Machining Centers
- Advanced Robotics and Automation Systems
