7211 ACD/TBTBVQ126
7200 & 7300 Series Super Precision Angular Contact Ball Bearings
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7211 ACD/TBTBVQ126 Bearing Product Overview & Core Advantages
The 7211 ACD/TBTBVQ126 is a precision angular contact ball bearing supplied as a triplex back-to-back (TBT) matched set. Engineered for applications demanding exceptional rigidity and accuracy, this configuration excels at handling combined loads (radial and axial) from multiple directions simultaneously. Manufactured to a P4A tolerance class, it offers superior running accuracy for high-performance machinery. The light preload (Class B) minimizes deflection under operational stresses, ensuring stable and precise shaft positioning.
7211 ACD/TBTBVQ126 Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7211 | Basic bearing series; 55 mm bore, 100 mm OD, 21 mm width per bearing. |
| ACD | Angular Contact design with a 25° contact angle. |
| TBT | Triplex Back-to-Back arrangement of three bearings. |
| BVQ126 | Manufacturer's specific code for a light preload (Class B) and P4A tolerance matched set. |
7211 ACD/TBTBVQ126 Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The triplex back-to-back (TBT) arrangement provides an exceptionally high rigidity support system, effectively resisting complex moment loads and providing stable rotational characteristics. This design significantly enhances the bearing's capacity to handle combined radial and axial loads.
Precision & High-Speed Performance: Built to P4A tolerance class, this bearing ensures minimal runout and vibration. The phenolic cage and optimized internal geometry contribute to lower friction and enable a high limiting speed of 34,000 rpm, making it suitable for high-speed applications.
Material & Lubrication: Constructed from chrome steel for both rings and balls, the bearing offers high durability and fatigue resistance. It comes pre-lubricated for immediate operation within its specified temperature range of -30°C to 110°C.
7211 ACD/TBTBVQ126 Bearing Typical Application Areas
This precision bearing set is ideally suited for high-demand applications where rigidity, accuracy, and speed are paramount. Key industries and machinery include:
- Machine Tool Spindles (e.g., milling, grinding, and turning centers)
- High-Frequency Motors and Spindles
- Precision Gearboxes and Transmission Systems
- Industrial Pumps and Compressors
