7011 ACD/P4AQBCB
7000 Series Super Precision Angular Contact Ball Bearings
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7011 ACD/P4AQBCB Bearing Product Overview & Core Advantages
The 7011 ACD/P4AQBCB is a precision quadruplex matched angular contact ball bearing designed for applications demanding extreme rigidity and accuracy. This P4A tolerance class bearing is preloaded and arranged in a Back-to-Back (QBC) configuration, enabling it to withstand significant combined loads (radial and axial) from both directions while maintaining exceptional operational stability. Its compact design and high load capacity make it ideal for high-precision, high-reliability machinery.
7011 ACD/P4AQBCB Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7011 | Basic bearing series and size designation (55mm bore, 90mm OD). |
| ACD | Angular Contact design with a 25° contact angle. |
| P4A | Indicates a high-precision tolerance class, exceeding ABEC 7/ISO P4 standards. |
| QBC | Denotes a Quadruplex (4-bearing) set in a Back-to-Back arrangement. |
| B | Specifies a Light preload / Class B for optimal rigidity and running accuracy. |
7011 ACD/P4AQBCB Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The quadruplex back-to-back arrangement creates a highly rigid bearing system that can handle heavy combined radial and thrust loads from both directions, minimizing shaft deflection under operation.
Precision & High-Speed Performance: Manufactured to P4A tolerance with a phenolic resin cage, this bearing ensures smooth operation and is capable of high rotational speeds (limiting speed of 34,000 rpm). The 25° contact angle provides an excellent balance between radial and axial load capacity.
Optimized for Performance: The set comes pre-lubricated and is manufactured from high-grade chrome steel for both rings and balls, ensuring long service life and consistent performance within a temperature range of -30°C to 110°C.
7011 ACD/P4AQBCB Bearing Typical Application Areas
This high-precision, matched bearing set is engineered for the most demanding applications, including:
- High-Speed Machine Tool Spindles
- Precision Grinding Spindles
- High-Rigidity Industrial Robots
- Advanced Medical & Laboratory Equipment
- Aerospace Actuation Systems
