7201 CD/P4ADBB
7200 & 7300 Series Super Precision Angular Contact Ball Bearings
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7201 CD/P4ADBB Bearing Product Overview & Core Advantages
The 7201 CD/P4ADBB is a precision duplex angular contact ball bearing designed for applications requiring exceptional rotational accuracy and rigidity. This metric bearing features a back-to-back (DB) matched arrangement and a P4A tolerance class, making it ideal for high-precision spindles and machinery. Its key advantage lies in its ability to handle combined loads (radial and axial) simultaneously while providing high system rigidity and stable operation at high speeds. The light preload (Class B) ensures smooth running and minimal deflection, contributing to superior performance in demanding applications.
7201 CD/P4ADBB Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7201 | Basic bearing series, indicating a 12mm bore, 32mm OD angular contact ball bearing. |
| C | 15° contact angle design, optimized for carrying combined loads. |
| D | Duplex (two single bearings supplied as a matched set). |
| P4A | High precision tolerance class for running accuracy, equivalent to ABEC 7. |
| DB | Back-to-Back mounting arrangement, providing high moment rigidity. |
| B | Light preload (Class B) for reduced deflection and smooth operation. |
7201 CD/P4ADBB Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The duplex back-to-back (DB) arrangement creates a wide effective spread between load centers, significantly increasing the bearing's resistance to moment loads and providing high system rigidity. This configuration, combined with the 15° contact angle, enables the bearing to efficiently support substantial combined radial and axial loads.
Precision & High-Speed Performance: Manufactured to P4A tolerance class, this bearing ensures minimal runout and vibration for precise applications. The phenolic cage offers excellent strength-to-weight ratio and is suitable for high-speed operation, contributing to the high limiting speed of 95,000 rpm. The light preload minimizes deflection at operating speeds.
Material & Construction: Constructed from chrome steel for both rings and balls, the bearing provides high durability and fatigue resistance. The open seal type allows for optimal lubrication flow, which is essential for the high-speed performance of this precision bearing.
7201 CD/P4ADBB Bearing Typical Application Areas
The 7201 CD/P4ADBB is engineered for high-performance applications where precision and rigidity are paramount. Typical uses include:
- Machine Tool Spindles: High-speed milling, grinding, and drilling spindles requiring extreme accuracy.
- Precision Rotary Systems: CNC indexing heads, rotary tables, and robotic arm joints.
- High-Speed Motors: Spindles for PCB drilling and small precision motors.
- Medical & Laboratory Equipment: Centrifuges and high-speed laboratory apparatus.
- Optical & Measuring Instruments: Devices requiring minimal rotational error and high stability.
