When modified v-belts, if the pulley on the plane, driving wheel diameter is 350. Passive wheel is big flywheel, now change driving wheel to E triangle groove, the flywheel is not change, the v belt around large surface of the flywheel, under the premise of without changing speed, driving wheel diameter calculation from the top E slot. If calculated from the top triangle belt groove, into a diameter of 420 pulley diameter, speed there is a change, to keep constant speed, v-belt pulley groove type E benchmark zui small diameter is 400 mm. Transmission ratio I = n1 n2 / tags: synchronous belt wheel import synchronous belt