7211 ACD/P4ADGB
7200 & 7300 Series Super Precision Angular Contact Ball Bearings
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7211 ACD/P4ADGB Bearing Product Overview & Core Advantages
The 7211 ACD/P4ADGB is a precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and reliability. This universal matchable bearing features a 25° contact angle and light preload (Class B), making it ideal for arrangements requiring high rigidity and precise rotational performance. Its P4A tolerance class ensures superior dimensional and running accuracy, while the phenolic cage contributes to excellent high-speed capabilities. This bearing is specifically engineered to handle combined loads efficiently, accommodating both radial and significant axial loads in one direction.
7211 ACD/P4ADGB Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7211 | Basic bearing series with 55mm bore, 100mm OD, 42mm width |
| ACD | 25° contact angle, universal matchable design |
| P4A | High precision tolerance class (equivalent to ABEC 7) |
| DGB | Universal match pairing designation for duplex arrangements |
7211 ACD/P4ADGB Bearing Structural Features & Performance Benefits
High Precision Construction: Manufactured to P4A tolerance class with tight dimensional controls (bore tolerance: -0.004mm to 0) ensuring exceptional running accuracy and minimal vibration.
Optimized Contact Design: The 25° contact angle provides optimal load distribution for combined radial and axial loading conditions, enhancing bearing service life.
High-Speed Capability: The phenolic resin cage offers excellent strength-to-weight ratio, contributing to the high limiting speed of 34,000 rpm while reducing centrifugal forces.
Universal Matching: As a Universal Matchable (SU) bearing, it can be paired in various configurations (back-to-back, face-to-face, or tandem) without selective matching, simplifying installation and maintenance.
Superior Load Capacity: With dynamic load rating of 19,170 lbf and static load rating of 18,338 lbf, this bearing delivers reliable performance under substantial operating loads.
7211 ACD/P4ADGB Bearing Typical Application Areas
- Machine Tool Spindles: High-precision machining centers and grinding spindles requiring exceptional accuracy and rigidity
- Precision Gearboxes: Industrial transmission systems demanding high-speed operation and reliable performance
- High-Speed Motors: Electric motors and spindles operating at elevated rotational speeds
- Medical Equipment: Diagnostic imaging systems and surgical tools requiring smooth, precise rotation
- Aerospace Systems: Control mechanisms and auxiliary power units where reliability is critical
- Robotics and Automation: Precision joints and positioning systems in industrial robots
