7011 ACDGA/HCP4A
Hybrid Ceramic Super Precision Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
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7011 ACDGA/HCP4A Bearing Product Overview & Core Advantages
The 7011 ACDGA/HCP4A is a single-row angular contact ball bearing engineered for high-precision applications demanding exceptional rotational accuracy and rigidity. Positioned in the P4A super-precision tolerance class, it is designed to accommodate combined loads (radial and axial) simultaneously, with a 25° contact angle optimized for high axial load capacity. Its core advantages include superior high-speed performance enabled by a lightweight phenolic cage and ceramic balls, and the convenience of being pre-lubricated and universally matchable (SU), allowing for flexible bearing arrangements in pairs.
Model Code Breakdown
- 7011: Basic series number, indicating a metric, single-row angular contact ball bearing with a 55mm bore and 90mm outside diameter.
- A: Denotes a 25° contact angle.
- CDGA: Internal design code specific to the manufacturer, often relating to internal geometry and performance optimizations.
- HCP4A: Indicates the bearing is supplied as part of a universally matchable (SU) set (H) and conforms to the P4A super-precision tolerance class.
7011 ACDGA/HCP4A Bearing Structural Features & Performance Benefits
High-Speed & High-Rigidity Performance: The combination of a lightweight phenolic resin cage and ceramic balls (Si3N4) significantly reduces centrifugal forces, enabling very high limiting speeds (34,000 rpm) while maintaining dimensional stability and reducing operating temperature.
Superior Load Capacity: The 25° contact angle is optimally designed to handle significant axial loads in one direction, as well as combined radial and axial loads, making it ideal for applications with demanding load conditions.
Ultra-Precision Operation: Manufactured to P4A tolerance class with extremely tight dimensional and running accuracy tolerances, this bearing ensures minimal vibration and exceptional running precision for critical spindles.
Universal Matchability (SU): Bearings supplied as a universally matchable set can be mounted in any combination (back-to-back, face-to-face, or tandem) to achieve the required preload and rigidity without selective matching, simplifying installation and inventory.
7011 ACDGA/HCP4A Bearing Typical Application Areas
This high-precision angular contact ball bearing is ideally suited for applications requiring high speed, high rigidity, and exceptional accuracy, including:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling and routing spindles.
- High-Frequency Motors: Spindles for electric motors and generators.
- Aerospace & Defense Systems: Gyroscopes, radar systems, and other precision instruments.
