The generate aspect is a worm. In purchase to combine the wheel/worm into a worm equipment, it must be ensured that the heart length is equal and the transmission ratio is equal. Heart distances are offered from inventory in little steps in between 17mm and 80mm. Every middle distance has a number of gear ratios. Ep worm gears are ideal for the production of worm drives with a shaft angle of 90°. Employing a worm drive, quite massive reduction ratios (up to one hundred:1) can be reached.