... gears factory,worm screw Features:1) name:cnc worm,cnc worm gear,cnc worm wheel2) material:brass, copper ,steel, alminum 3)Color: Silver,White,Black,Bronze ... parts.metal10.HistoryEstablished in 2000,12 years manufacture experiences1,Worm gears are used when large gear reductions are needed. It ... is not turning. One other very interesting usage of worm gears is in the Torsen differential, which is used ...