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The mechanism for varying the pulley diameter can take many forms, including adjustable sheaves or conical pulleys. By changing the effective diameter of the pulleys, the system can alter the speed ratio between the input and output. As the diameter of the driving pulley decreases, the speed of the driven pulley increases, and vice versa. This principle allows for smooth transitions in speed and ensures that the system can operate efficiently under varying loads.


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A Poly-V TB2 belt is a type of multi-ribbed belt designed for high-performance applications. It features a series of longitudinal ribs that run along the belt's length, providing multiple contact points with the pulleys. This ribbed structure is designed for quiet operation and minimal vibration, offering an efficient means of power transmission. The TB2 designation typically indicates specific dimensions and properties of the belt, which are crucial for ensuring compatibility with the systems in which they are used.


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