7211 ACD/P4ADGC
7200 & 7300 Series Super Precision Angular Contact Ball Bearings
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7211 ACD/P4ADGC Bearing Product Overview & Core Advantages
The 7211 ACD/P4ADGC is a high-precision double row angular contact ball bearing designed for demanding applications requiring exceptional accuracy and rigidity. Engineered to simultaneously handle combined radial and axial loads from both directions, this bearing offers a compact and robust solution. Its P4A super-precision tolerance and universal matchable (SU) designation ensure superior running accuracy and simplified mounting in preloaded arrangements. The phenolic cage and optimized internal geometry contribute to its high-speed capabilities, making it an ideal choice for high-performance machinery where reliability and precision are paramount.
7211 ACD/P4ADGC Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7211 | Basic bearing series; 55 mm bore, 100 mm OD, 42 mm width. |
| AC | Angular Contact design with a 25° contact angle. |
| D | Double row design for high rigidity and increased load capacity. |
| P4A | Super Precision tolerance class, exceeding ABEC 7/ISO P4 standards. |
| DGC | Universal Matchable (SU) bearing supplied with a Moderate preload (Class C) for immediate use in paired sets. |
7211 ACD/P4ADGC Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The double row angular contact construction provides superior stiffness, enabling stable support for shafts under complex combined loads. This design effectively manages radial loads and bidirectional axial loads, making it suitable for applications with significant moment loads.
Precision & High-Speed Performance: Manufactured to P4A tolerance class, this bearing ensures minimal runout and vibration. The lightweight phenolic cage is engineered for high-speed operation, reducing centrifugal forces and friction, which supports the high limiting speed of 34,000 rpm.
Optimized Internal Geometry: With a 25° contact angle, 15 high-grade chrome steel balls, and precise raceway grinding, the bearing achieves an optimal balance between axial load capacity and speed performance.
Universal Matching & Simplified Assembly: As a Universal Matchable (SU) bearing, any two 7211 ACD/P4ADGC bearings can be paired in a back-to-back (DB) or face-to-face (DF) arrangement to create a preloaded set without the need for selective mounting, reducing assembly time and complexity.
7211 ACD/P4ADGC Bearing Typical Application Areas
This high-precision, high-rigidity bearing is ideally suited for:
- Machine Tool Spindles: For high-speed milling, grinding, and turning centers requiring extreme accuracy and rigidity.
- Precision Gearboxes: Especially in high-performance automotive and industrial transmissions.
- High-Frequency Spindles: Used in PCB drilling and routing equipment.
- Robotic Arms and Actuators: Providing precise and stiff rotational support in joints.
- Medical Equipment: Such as high-speed dental handpieces and imaging scanner gantries.
