hi all

i'm looking to build a large diameter pulley

i have a 200mm lazy susan bearing that i plan on mating with a machined piece of corian a type of hard plastic

i intend to cut a circle out of the corian and then using a dremel cut the grooves on the edge of the corian for a gt2 belt .

i am wondering if there is a formula for taking the belt measurements and working out the nearest diameter that would fit

a 200mm circle so that i end up with a equal amount of divisions or ridges so there is no jumping or jerking as a rotation is completed

i figure its going to be a bit of a mission to accomplish but i thought i'd ask before i jump in.

thanks for your time and thoughts in advance