7011 CD/P4ADBA
7000 Series Super Precision Angular Contact Ball Bearings
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7011 CD/P4ADBA Bearing Product Overview & Core Advantages
The 7011 CD/P4ADBA is a duplex pair of precision angular contact ball bearings in a Back-to-Back (DB) arrangement. Engineered for applications demanding high rigidity and excellent running accuracy, this pre-loaded set is designed to accommodate combined loads (radial and axial) from both directions simultaneously. Manufactured to the exacting P4A tolerance class, it offers superior dimensional stability and rotational precision, making it ideal for high-performance, high-reliability machinery.
7011 CD/P4ADBA Bearing Model Code Explained, Specifications & Naming Convention
- 7011: Basic designation indicating a 55mm bore, 90mm OD, and 36mm width.
- CD: Indicates a duplex pair with a specific preload and universal matching. In this context, it specifies a Back-to-Back (DB) arrangement.
- P4A: Denotes a super-precision tolerance class exceeding ABEC 7, with enhanced width and runout tolerances for exceptional accuracy.
- DB: Specifies the Duplex Back-to-Back mounting arrangement.
- A: Indicates the Extra Light preload class, optimizing the balance between rigidity, speed, and low heat generation.
7011 CD/P4ADBA Bearing Structural Features & Performance Benefits
High Rigidity & Stability: The duplex Back-to-Back (DB) arrangement creates a rigid, moment-resisting bearing system, significantly enhancing the stiffness of the entire shaft assembly. This is critical for applications requiring minimal deflection under load.
Superior Precision: Manufactured to a P4A tolerance class with a 15° contact angle, this bearing set ensures extremely low runout and vibration, contributing to superior machining finish and positional accuracy.
Optimized High-Speed Performance: The lightweight phenolic resin cage reduces centrifugal forces, while the extra light preload (Class A) minimizes friction and heat buildup, allowing for a high limiting speed of 34,000 rpm.
High Load Capacity: With a dynamic load rating of 14,332 lbf and a static load rating of 14,738 lbf, the bearing is capable of handling significant combined radial and axial loads.
7011 CD/P4ADBA Bearing Typical Application Areas
This high-precision bearing pair is ideally suited for demanding applications where rigidity, speed, and accuracy are paramount. Key industries and equipment include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Robotic Drives: Arm joints and high-accuracy servo motors.
- High-Frequency Spindles: PCB drilling and routing machines.
- Medical Equipment: Dental handpieces and laboratory centrifuges.
- Aerospace & Defense Systems: Gyroscopes, radar platforms, and navigation instruments.
