The drive element is a worm. In purchase to mix the wheel/worm into a worm equipment, it must be ensured that the heart distance is equivalent and the transmission ratio is equivalent. Middle distances are offered from stock in small methods among 17mm and 80mm. Every single center distance has several equipment ratios. Ep worm gears are appropriate for the production of worm drives with a shaft angle of 90°. Using a worm push, very large reduction ratios (up to a hundred:1) can be attained.