7210 ACD/HCP4ADBB
Hybrid Ceramic Super Precision Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
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7210 ACD/HCP4ADBB Bearing Product Overview & Core Advantages
The 7210 ACD/HCP4ADBB is a precision duplex angular contact ball bearing designed for demanding applications requiring exceptional rotational accuracy and rigidity. This matched back-to-back arrangement provides high resistance to moment loads and combined loads (radial and axial). Featuring a light preload (Class B) and manufactured to P4A tolerance class, it delivers superior running accuracy and stability, making it ideal for high-speed, high-precision machinery where maximum system rigidity is critical.
7210 ACD/HCP4ADBB Bearing Model Code Explained, Specifications & Naming Convention
- 7210: Basic series code (Bore: 50 mm, OD: 90 mm, Width: 20 mm per bearing).
- AC: Angular Contact design.
- D: Duplex (Two bearings in a set).
- HC: High-Capacity internal geometry.
- P4A: Super-precision tolerance class (exceeding ABEC 7).
- DB: Matched arrangement in Back-to-Back (DB) configuration.
- B: Light preload grade.
7210 ACD/HCP4ADBB Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The back-to-back duplex arrangement creates a wide effective spread, significantly increasing moment stiffness and the ability to handle combined radial and axial loads from both directions. The 25° contact angle is optimized for high axial load capacity.
High-Speed Performance: The combination of a lightweight phenolic resin cage and ceramic (silicon nitride) balls reduces centrifugal forces and friction, enabling a high limiting speed of 46,000 rpm. This construction also minimizes heat generation.
Precision & Longevity: Manufactured to P4A super-precision standards with tight dimensional tolerances, this bearing ensures smooth, quiet, and vibration-free operation. The open design allows for optimized lubrication management in controlled environments.
7210 ACD/HCP4ADBB Bearing Typical Application Areas
This high-performance bearing is engineered for advanced applications, including:
- Machine Tool Spindles (High-speed milling, grinding)
- Precision Gearboxes
- High-Frequency Motors and Spindles
- Aerospace & Defense Actuation Systems
- Medical Equipment (e.g., High-speed dental handpieces)
