7216 ACD/P4DBA
7200 & 7300 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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7216 ACD/P4DBA Bearing Product Overview & Core Advantages
The 7216 ACD/P4DBA is a precision duplex angular contact ball bearing designed for applications requiring exceptional rotational accuracy and high rigidity. This P4 tolerance class bearing features a back-to-back (DB) matched arrangement, enabling it to withstand combined radial and axial loads from both directions. Its extra light preload (Class A) ensures minimal running torque and high positional accuracy, making it ideal for high-speed spindles and other precision machinery where superior performance is critical.
7216 ACD/P4DBA Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning |
|---|---|
| AC | Angular Contact design with a 25° contact angle for optimal axial load capacity. |
| D | Duplex configuration, indicating two bearings are supplied as a matched set. |
| P4 | High precision tolerance class, ensuring extremely tight dimensional and running accuracy. |
| DB | Back-to-Back mounting arrangement, providing high moment rigidity and stability. |
| A | Signifies Extra Light Preload, which minimizes friction and heat generation at high speeds. |
7216 ACD/P4DBA Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The duplex back-to-back (DB) design creates a wide effective spread, significantly increasing the bearing's resistance to moment loads and providing exceptional system rigidity. This configuration allows the bearing set to handle significant combined loads efficiently.
Precision & High-Speed Performance: Manufactured to P4 tolerance standards and featuring a lightweight phenolic resin cage, this bearing achieves excellent rotational precision and is capable of operating at high speeds (limiting speed of 28,000 rpm). The 25° contact angle is optimized for high-speed applications requiring robust axial load support.
Material & Durability: Constructed from chrome steel for both rings and balls, the bearing offers high fatigue life and wear resistance. The open design is pre-lubricated, suitable for the specified temperature range of -30°C to 110°C.
7216 ACD/P4DBA Bearing Typical Application Areas
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Gearboxes: Applications demanding high positional accuracy and low runout.
- Industrial Pumps & Compressors: For shafts subjected to combined radial and axial forces.
- High-Frequency Motors: Where minimal preload and high-speed capability are essential.
