7212 ACD/P4ADGC
7200 & 7300 Series Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
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7212 ACD/P4ADGC Bearing Product Overview & Core Advantages
The 7212 ACD/P4ADGC is a precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and reliability. As a universal matchable (SU) bearing supplied in a pre-set pair, it delivers outstanding performance in handling combined radial and axial loads. Its P4A tolerance class ensures ultra-precision operation, while the moderate preload (Class C) provides optimal rigidity and rotational accuracy right from installation. This bearing is engineered for high-speed capability and stable operation within a wide temperature range.
7212 ACD/P4ADGC Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning |
|---|---|
| ACD | Angular Contact Design with a 25° contact angle, optimized for handling significant axial loads in one direction. |
| P4A | Indicates an ultra-precision tolerance class, with extremely tight limits on bore, outside diameter, and width dimensions for superior running accuracy. |
| DGC | Specifies a phenolic cage material. This cage design is lightweight and robust, contributing to lower friction, lower operating temperatures, and higher limiting speeds. |
7212 ACD/P4ADGC Bearing Structural Features & Performance Benefits
High Rigidity and Load Capacity: The angular contact design with a 25° contact angle and universal matching (SU) arrangement allows two bearings to be paired for exceptional rigidity. This configuration enables the bearing set to withstand substantial combined loads (radial and axial) simultaneously.
High-Speed Performance: The lightweight and self-lubricating phenolic cage (DGC) minimizes centrifugal forces and friction, enabling a high limiting speed of 36,000 rpm. The bearing comes pre-lubricated for immediate operation.
Precision and Accuracy: Manufactured to P4A tolerance class, this bearing guarantees minimal runout and vibration, which is critical for applications requiring high positional accuracy and smooth operation.
Durability and Material Quality: Constructed from chrome steel for both rings and balls, the bearing offers high fatigue life and resistance to wear, ensuring long-term reliability.
7212 ACD/P4ADGC Bearing Typical Application Areas
- Machine Tool Spindles: For high-precision milling, grinding, and turning centers where rigidity and accuracy are paramount.
- High-Frequency Motors and Spindles: Ideal for applications demanding high rotational speeds and low vibration.
- Precision Gearboxes and Pumps: Where reliable performance under combined loads is essential.
- Medical and Laboratory Equipment: Such as centrifuges and scanners that require smooth, quiet, and precise rotation.
- Aerospace and Defense Systems: In actuators, control systems, and other critical rotating assemblies.
