benhur83

Worm gear manufacturing is difficult and cost is higger than the others also efficieny is lowest because of sliding motion cause friction loss. And other disadvantage is diamension is bigger...

you can decide how many stage using reduction rate. 1. <8 2.<45 3<200 and also you must calculate this rate for example input w=1500rpm ;output w=15rpm speed reduction ratio 1500/15=100...