How much does increasing the pulley diameter by one centimeter increase the rotation speed?

[ORicardo]

Increasing the pulley diameter by one centimeter can increase the rotation speed by 1480/d revolutions. Here is the relevant introduction: Definition: Pulley wheels, belonging to the category of hub-like components, are generally relatively large in size and are primarily manufactured through casting or forging processes. Larger-sized pulleys are typically designed using casting methods, with materials usually being cast iron (due to its good casting properties), while cast steel is rarely used (as steel has poor casting properties). Expression method: Represented by the symbol "n"; its international standard unit is r/s (revolutions per second) or r/min (revolutions per minute), also expressed as RPM (revolutions per minute, mainly adopted in Japan and Europe). When the unit is r/s, the value is numerically equal to frequency, i.e., n=f=1/T, where T is the period of circular motion.