A ring gear of a planetary reduction gear is screwed into an inner peripheral surface of a first housing through an opening thereof, while {TAIL ~ the thrust receiving flange} of {HEAD ~ a screw feed mechanism} is held by the locknut screwed into an inner peripheral surface of a second housing through an opening thereof 
A ring gear of a planetary reduction gear is screwed into an inner peripheral surface of a first housing through an opening thereof , while { TAIL ~ the thrust receiving flange } of { HEAD ~ a screw feed mechanism } is held by the locknut screwed into an inner peripheral surface of a second housing through an opening thereof
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH