7210 ACD/P4ATBTB
7200 & 7300 Series Super Precision Angular Contact Ball Bearings
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7210 ACD/P4ATBTB Bearing Product Overview & Core Advantages
The 7210 ACD/P4ATBTB is a precision angular contact ball bearing configured in a triplex back-to-back (TBT) matched set. Engineered for applications demanding exceptional rotational accuracy and rigidity, this bearing is designed to handle significant combined loads—simultaneously supporting high radial loads and axial loads in both directions. Its P4A tolerance class ensures superior running accuracy, making it ideal for high-speed spindles and other precision machinery where minimal runout and vibration are critical. The light preload (Class B) minimizes deflection under operational forces, enhancing system stability and performance.
7210 ACD/P4ATBTB Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7210 | Basic bearing designation: 50 mm bore, 90 mm OD, 60 mm width. |
| ACD | Angular Contact design with a 25° contact angle. |
| P4A | High-Precision Tolerance Class, exceeding ABEC-7/ISO P4 standards for dimensional and running accuracy. |
| TBT | Triplex Back-to-Back arrangement. A set of three bearings pre-matched for optimal load distribution and moment stiffness. |
7210 ACD/P4ATBTB Bearing Structural Features & Performance Benefits
- High Rigidity & Moment Load Capacity: The triplex back-to-back (TBT) configuration creates a highly rigid bearing system capable of withstanding substantial moment loads and complex combined loads, making it exceptionally stable in demanding applications.
- Optimized for High-Speed Operation: The phenolic resin cage offers low weight and excellent performance at high speeds, contributing to the bearing's limiting speed of 46,000 rpm. The 25° contact angle provides an ideal balance between radial and axial load capacity for high-speed spindles.
- Precision & Accuracy: Manufactured to P4A tolerance class with tight dimensional control on bore, outside diameter, and width, ensuring precise fitment and minimal vibration for superior operational accuracy.
- Robust Construction: Components made from chrome steel provide high load ratings (20,768 lbf dynamic, 22,050 lbf static) and excellent durability. The bearing is pre-lubricated for immediate operation.
7210 ACD/P4ATBTB Bearing Typical Application Areas
The 7210 ACD/P4ATBTB is specified for high-performance machinery where precision, speed, and rigidity are paramount. Key applications include:
- Machine Tool Spindles (CNC machining centers, grinding spindles)
- High-Speed Motors and Precision Spindles
- Robotic Arm Joints and Rotary Tables
- Aerospace & Defense Positioning Systems
