7212 CD/P4ADBC
7200 & 7300 Series Super Precision Angular Contact Ball Bearings
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7212 CD/P4ADBC Bearing Product Overview & Core Advantages
The 7212 CD/P4ADBC is a precision duplex back-to-back angular contact ball bearing designed for applications requiring exceptional rotational accuracy and rigidity. This P4A tolerance class bearing is pre-lubricated and features a moderate preload (Class C), making it ideal for machine tool spindles and other high-precision machinery where superior running accuracy and high rigidity are critical. Its duplex back-to-back (DB) arrangement enables it to withstand combined loads, including significant moment loads, while maintaining precise shaft positioning.
7212 CD/P4ADBC 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 |
| C | 15° contact angle design |
| D | Duplex arrangement (two bearings supplied as a set) |
| P4A | High precision tolerance class with enhanced running accuracy requirements |
| DB | Back-to-back mounting arrangement |
| C | Moderate preload (Class C) |
7212 CD/P4ADBC Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The duplex back-to-back arrangement creates a wide effective spread between load centers, significantly increasing system rigidity and moment load capacity. This configuration enables the bearing set to handle substantial combined radial and axial loads from both directions simultaneously.
Precision Performance: Manufactured to P4A tolerance class standards with tight dimensional control (bore/OD tolerance: -0.004mm to 0), this bearing ensures minimal runout and vibration for applications demanding exceptional rotational accuracy.
Optimized Component Design: The phenolic cage provides excellent guidance with low friction characteristics, while the chrome steel balls and rings ensure high durability and fatigue resistance under demanding operating conditions.
Ready-to-Install Configuration: The bearing set comes pre-lubricated and with moderate preload applied, eliminating the need for complex mounting procedures and ensuring immediate optimal performance upon installation.
7212 CD/P4ADBC Bearing Typical Application Areas
- Machine Tool Spindles: High-speed milling, grinding, and turning applications requiring precision and rigidity
- Precision Gearboxes: Industrial transmission systems demanding accurate shaft positioning
- High-Speed Motors: Applications where minimal vibration and high rotational accuracy are critical
- Industrial Pumps & Compressors: Equipment requiring reliable performance under combined loading conditions
- Robotics & Automation: Precision positioning systems and rotary joints
