With this application through 5 steps we can easily identify everything related to a pulley transmission system, in step 1 we will identify the type of service selected to work the system according to its working hours and its torque, we identify its corrected power and the number of belts that the system must use, in step 2 we find the graph that indicates the type of pulley to use, in step 3 we will identify the diameters of the pulleys or the rpm that we require from the motor or the ventilation system, and finally in step 4 we are going to identify the length of the belt for this system!, in step 5 by means of a formula we calculate the minimum diameter of the shaft that must be installed!, it is a great engineering tool that will help us a lot to make quick and concrete calculations! lets try it! MTC LTDA