1, WH series gearbox worm(WHT/WHX/WHS/WHC) 2, CW series gearbox worm(CWU/CWS/CWO) 3, WP series gearbox worm(WPA/WPS/WPW/WPE) 1,Worm gearsare used when large gear reductions are needed. It is common for worm gears to have reductions of 20:1, and even up to 300:1 or greater.2,Many worm gears have an interesting property that no other gear set has: the worm can easily turn the gear, but the gear ...