Bonfiglioli worm gears VF and W - Sizes 27 to 75 in aluminium other sizes in cast iron - Ratio 1 step up t0 i=100 - combined with helical gear up to i=300 - Double worm gearboxes ratios up to i=10.000 - Torque from 13 Nm to 7100 Nm. W-gears are delivered uassembled.