The worm gear has a central hub to which is connected a second housing and which in turn has a driven worm in {HEAD ~ drive relation} with {TAIL ~ a worm gear} mounted therein 
with
The worm gear has a central hub to which is connected a second housing and which in turn has a driven worm in { HEAD ~ drive relation } with { TAIL ~ a worm gear } mounted therein
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH