7216 CD/PA9ADBC
7200 & 7300 Series Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
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7216 CD/PA9ADBC Bearing Product Overview & Core Advantages
The 7216 CD/PA9ADBC is a precision duplex angular contact ball bearing designed for applications demanding exceptional rigidity and accuracy. This matched set is arranged in a Back-to-Back (DB) configuration, providing superior resistance to moment loads and enabling high operational stability. With its moderate preload (Class C) and PA9A tolerance class, it is engineered for high-precision, high-reliability scenarios where controlling shaft displacement and runout is critical. The open design and phenolic cage contribute to its excellent high-speed performance.
7216 CD/PA9ADBC Bearing Model Code Explained, Specifications & Naming Convention
- 7216: Basic designation indicating a 80 mm bore and 140 mm outside diameter.
- C: Denotes a 15° contact angle, optimized for combined loads.
- D: Indicates the bearing is part of a duplex (matched) pair.
- /PA9A: Specifies the high-precision tolerance class, ensuring minimal dimensional variation for superior running accuracy.
- DBC: Defines the specific duplex arrangement as Back-to-Back (DB) with a moderate preload (C).
7216 CD/PA9ADBC Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The Back-to-Back (DB) duplex arrangement creates a wide, rigid support system that effectively resists combined radial and axial loads from both directions, as well as overturning moments. This makes the bearing set exceptionally stable under complex loading conditions.
Precision & High-Speed Performance: Manufactured to a PA9A tolerance class, this bearing ensures minimal runout and precise shaft positioning. The lightweight phenolic resin cage is ideal for high-speed applications, reducing centrifugal forces and allowing for a limiting speed of 28,000 rpm. The open design facilitates efficient air circulation and custom lubrication schemes for optimal thermal management.
Durability & Reliability: Constructed from chrome steel for both rings and balls, the bearing provides high fatigue resistance and long service life. The matched set is supplied pre-lubricated and ready for installation, ensuring immediate and reliable operation.
7216 CD/PA9ADBC Bearing Typical Application Areas
This high-precision duplex bearing is ideally suited for demanding applications such as:
- Machine Tool Spindles (e.g., milling, grinding, and turning centers)
- High-Frequency Motors and Spindles
- Precision Gearboxes and Pumps
- Industrial Robotics and Automation Equipment
- Aerospace Actuation Systems
