7201 ACD/P4A
7200 & 7300 Series Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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7201 ACD/P4A Bearing Product Overview & Core Advantages
The 7201 ACD/P4A is a single-row angular contact ball bearing designed for high-precision and high-speed applications. Engineered to a P4 (ABEC-7) tolerance class, it offers exceptional running accuracy. Its primary function is to support combined loads, efficiently carrying significant radial loads and thrust loads in one direction simultaneously. The bearing is preloaded, ensuring high system rigidity, minimal axial and radial runout, and precise rotational performance, making it ideal for demanding, high-accuracy machinery.
7201 ACD/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7201 | Basic bearing series designation, indicating a metric bore diameter of 12 mm, an outside diameter of 32 mm, and a width of 10 mm. |
| ACD | Signifies a 25° contact angle and that the bearing is designed for a Duplex (DB/DF/DT) arrangement when mounted with a similar bearing. |
| P4A | Indicates the bearing conforms to the P4 tolerance class (equivalent to ABEC-7), denoting superior dimensional and running accuracy. The "A" suffix often specifies a specific tolerance subset or preload level. |
7201 ACD/P4A Bearing Structural Features & Performance Benefits
- High Rigidity and Precision: The 25° contact angle and preload provide excellent axial and radial stiffness, crucial for applications requiring high positional accuracy and minimal deflection under load.
- Superior High-Speed Capability: The lightweight phenolic resin cage minimizes centrifugal forces, reduces friction, and contributes to the high limiting speed of 70,000 rpm. This makes it an excellent high-speed bearing.
- Optimized Load Capacity: The design is optimized to handle combined radial and axial loads effectively. With a dynamic load rating of 1287 lbf, it offers reliable performance under demanding conditions.
- Premium Materials: Constructed from chrome steel for both rings and balls, ensuring high durability, wear resistance, and a long operational life.
7201 ACD/P4A Bearing Typical Application Areas
This precision angular contact bearing is ideally suited for high-performance applications where speed, accuracy, and rigidity are paramount. Key industries and equipment include:
- Machine Tool Spindles (High-speed machining centers, grinding spindles)
- Precision Robotic Drives and Gearboxes
- High-Frequency Motors and Spindles
- Medical and Dental Equipment (e.g., high-speed handpieces)
- Aerospace Instrumentation and Control Systems
