7212 ACD/P4ADGD
7200 & 7300 Series Super Precision Angular Contact Ball Bearings
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7212 ACD/P4ADGD Bearing Product Overview & Core Advantages
The 7212 ACD/P4ADGD is a precision angular contact ball bearing designed for demanding applications requiring exceptional rigidity and accuracy. This universal matchable bearing features a 25° contact angle and heavy preload (Class D), enabling it to handle significant combined loads (radial and axial) simultaneously. Manufactured to P4A tolerance class, it delivers superior running accuracy and rotational precision, making it ideal for high-speed, high-rigidity spindle systems and other precision machinery.
7212 ACD/P4ADGD Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
| 7212 | Basic bearing series with 60mm bore, 110mm OD |
| ACD | Angular Contact Design with 25° contact angle |
| P4A | High precision tolerance class (superior to ABEC 7) |
| D | Heavy preload classification for maximum rigidity |
| GD | Grease lubricated for immediate operation |
7212 ACD/P4ADGD Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The angular contact design with 25° contact angle and heavy preload provides exceptional stiffness, supporting combined radial and axial loads effectively. With a dynamic load rating of 19,890 lbf and static load rating of 20,250 lbf, this bearing delivers reliable performance under demanding conditions.
Precision Performance: Manufactured to P4A tolerance class with tight dimensional controls (bore/OD tolerance: -0.004mm to 0), this bearing ensures minimal runout and vibration for high-speed applications up to 36,000 rpm.
Optimized Internal Design: The phenolic cage provides excellent strength-to-weight ratio and smooth operation at high speeds. With 16 precision chrome steel balls of 14.288mm diameter, the bearing offers balanced load distribution and consistent performance.
Universal Matching Capability: Designed as Universal Matchable (SU), these bearings can be paired in various configurations (back-to-back, face-to-face, or tandem) without selective matching, simplifying installation and maintenance.
7212 ACD/P4ADGD Bearing Typical Application Areas
- Machine Tool Spindles: High-speed milling, grinding, and turning centers requiring precision and rigidity
- Precision Spindles: PCB drilling, semiconductor manufacturing equipment
- High-Speed Motors: Industrial motors and generators operating at elevated speeds
- Robotics: Precision joints and rotary actuators demanding high accuracy
- Aerospace Components: Guidance systems, actuator mechanisms, and auxiliary power units
- Medical Equipment: High-speed dental handpieces, laboratory automation systems
