You don't want to know how to make a sprocket, so heres how I made one for the power feed on my mill. I got a disc of steel the right thickness, and marked it out for the twenty teeth I wanted, I then drilled holes for each tooth of the correct size, then cut the teeth with a hacksaw, and finished of with a file, I did'nt have a clue how to go about doing it back then, just did it. Ian S C