7011 CD/P4AQBCA
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 CD/P4AQBCA Bearing Product Overview & Core Advantages
The 7011 CD/P4AQBCA is a precision angular contact ball bearing configured as a Quadruplex Back-to-Back (QBC) matched set. Engineered to the exacting P4A tolerance class, this bearing is designed for applications demanding exceptional rotational accuracy, high system rigidity, and the ability to handle combined loads. Its quadruplex arrangement provides superior moment load capacity and stability, making it an ideal solution for high-precision, high-stiffness machinery.
7011 CD/P4AQBCA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7011 | Standard bearing series designation (55mm bore, 90mm OD) |
| CD | 15° contact angle design, optimized for high-speed operation |
| P4A | High-precision tolerance class exceeding ABEC 7 standards |
| QBCA | Quadruplex Back-to-Back arrangement with Extra light preload (Class A) |
7011 CD/P4AQBCA Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The quadruplex back-to-back configuration creates an exceptionally rigid bearing system capable of withstanding heavy combined loads (radial, axial, and moment loads) simultaneously. This arrangement significantly enhances system stability under complex loading conditions.
Precision Performance: Manufactured to P4A tolerance class with an extra light preload (Class A), this bearing ensures minimal runout and vibration, delivering superior rotational accuracy essential for precision applications.
High-Speed Capability: Featuring a phenolic cage and optimized 15° contact angle, the bearing achieves excellent high-speed performance with a limiting speed of 34,000 rpm, while maintaining dimensional stability through reduced centrifugal forces.
Premium Material Construction: Manufactured from chrome steel for both rings and balls, the bearing delivers exceptional durability, wear resistance, and consistent performance across the operating temperature range of -30°C to 110°C.
7011 CD/P4AQBCA Bearing Typical Application Areas
The 7011 CD/P4AQBCA is specifically engineered for high-precision machinery requiring maximum rigidity and accuracy:
- Machine Tool Spindles - High-speed milling, grinding, and turning centers
- Precision Robotics - Articulated arms and high-accuracy positioning systems
- Aerospace Systems - Gyroscopes, navigation equipment, and flight control mechanisms
- Medical Equipment - High-speed dental handpieces and surgical drill systems
- Test & Measurement Instruments - Coordinate measuring machines and optical inspection systems
