7212 ACD/P4ADBB
7200 & 7300 Series Super Precision Angular Contact Ball Bearings
Image may differ from product. See technical specification for details.
Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
- Fast delivery
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
Product Overview and Core Advantages
The 7212 ACD/P4ADBB is a precision duplex angular contact ball bearing designed for applications requiring exceptional rigidity and accuracy. This metric system bearing features a back-to-back (DB) matched arrangement and a Light (Class B) preload, making it ideal for handling combined loads including significant radial and axial forces. Its P4A tolerance class ensures superior running accuracy, while the phenolic cage and optimized 25° contact angle contribute to outstanding high-speed performance and operational stability in demanding environments.
7212 ACD/P4ADBB Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7212 | Basic bearing series, indicating a 60 mm bore, 110 mm OD, and 44 mm width. |
| AC | Angular Contact design with a 25° contact angle. |
| D | Duplex (two bearings in a set). |
| P4A | High precision tolerance class for exceptional dimensional and running accuracy. |
| DB | Back-to-Back matched arrangement, providing high moment rigidity. |
| B | Light preload classification. |
Structural Features and Performance Benefits
High Rigidity and Load Capacity: The duplex back-to-back (DB) arrangement creates a wide effective spread, significantly increasing the bearing's resistance to moment loads and providing high rigidity. This configuration, combined with a 25° contact angle and 16 high-grade chrome steel balls, enables the bearing to support substantial combined radial and axial loads (Dynamic: 19,890 lbf, Static: 20,250 lbf).
High-Speed Performance: The lightweight phenolic cage minimizes centrifugal forces and ensures stable operation at the limiting speed of 36,000 rpm. The precision-ground chrome steel components and optimized internal geometry reduce friction and heat generation.
Precision and Stability: Manufactured to P4A tolerance class with tight dimensional controls on the bore, outside diameter, and width, this bearing guarantees minimal runout and superior positional accuracy. The light preload eliminates internal clearance, enhancing shaft guidance and system stiffness.
7212 ACD/P4ADBB Bearing Typical Application Areas
- Machine Tool Spindles: For high-precision milling, grinding, and turning centers requiring extreme rigidity and accuracy.
- High-Speed Spindles: In PCB drilling, dental handpieces, and other applications demanding high rotational speeds.
- Precision Gearboxes: Where accurate shaft positioning and load capacity are critical.
- Industrial Pumps and Compressors: For handling axial and radial loads in demanding fluid-handling systems.
