7201 ACD/P4ATBTC
7200 & 7300 Series Super Precision Angular Contact Ball Bearings
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7201 ACD/P4ATBTC Bearing Product Overview & Core Advantages
The 7201 ACD/P4ATBTC is a metric system triplex matched set of angular contact ball bearings designed for applications demanding high precision and extreme rigidity. This specific configuration, Back-to-Back (TBT) arrangement with a Moderate (Class C) preload, is engineered to handle significant combined loads (radial and axial) and provide exceptional operational stability. Manufactured to the stringent P4A tolerance class, these bearings are ideal for high-speed, high-accuracy machinery where minimal runout and precise shaft positioning are critical.
7201 ACD/P4ATBTC Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Significance |
|---|---|---|
| 7201 | Basic Bearing Series & Size | Denotes a 12mm bore, 32mm OD, and 10mm width per bearing. |
| AC | Angular Contact | Optimized geometry to support combined radial and axial loads. |
| D | Moderate Preload (Class C) | Pre-set internal clearance for enhanced stiffness and reduced vibration. |
| P4A | High Precision Tolerance Class | Guarantees extremely tight dimensional and running accuracy. |
| TBT | Triplex Back-to-Back Arrangement | Three bearings are matched and mounted to withstand moment loads and provide maximum rigidity. |
| C | Phenolic Cage | Lightweight cage material contributing to high-speed performance and reduced friction. |
7201 ACD/P4ATBTC Bearing Structural Features & Performance Benefits
Unmatched Rigidity and Load Capacity: The triplex back-to-back (TBT) arrangement creates an exceptionally stiff bearing system capable of handling heavy combined loads and moment loads. The 25° contact angle is optimized for supporting substantial axial loads in both directions. With a dynamic load rating of 2790 lbf and static load rating of 1654 lbf, this set ensures reliable performance under demanding conditions.
High-Speed Precision: The combination of a lightweight phenolic cage and the P4A precision tolerance enables smooth operation at high rotational speeds, with a limiting speed of 95,000 rpm. The moderate preload minimizes axial and radial play, ensuring precise shaft guidance and reducing non-repetitive runout.
Durability and Material Integrity: Constructed from high-grade chrome steel for both rings and balls, the bearing offers excellent wear resistance and long service life. The open seal type allows for optimal lubrication management in controlled environments.
7201 ACD/P4ATBTC Bearing Typical Application Areas
The 7201 ACD/P4ATBTC bearing set is specifically designed for high-performance applications, including:
- High-Frequency Machine Tool Spindles for milling, grinding, and drilling.
- Precision Robotic Drives and Actuators requiring high rigidity and accuracy.
- High-Speed Dental and Medical Handpieces.
- Advanced Aerospace and Defense Instrumentation.
- High-RPM Motors and Encoders in automation systems.
