As some of you know, I sometimes wear a prosthetic arm. This consists of a thermoplastic socket that slides over my residual arm, ending in a ball-and-socket connection threaded to receive a manufactured "forearm." Looks like pictures below.
Anyway, the most expedient "forearm" is actually a piece of 1/2" aluminum or titanium tube- light and strong. Problem is, the socket is threaded to receive a 1/2"-20 thread, and it seems exceedingly difficult to mate a bolt or chunk of threaded rod to the tube to thread into the socket.
Does this question make sense? Any ideas from the peanut gallery to put this thing back together?
Anyway, the most expedient "forearm" is actually a piece of 1/2" aluminum or titanium tube- light and strong. Problem is, the socket is threaded to receive a 1/2"-20 thread, and it seems exceedingly difficult to mate a bolt or chunk of threaded rod to the tube to thread into the socket.
Does this question make sense? Any ideas from the peanut gallery to put this thing back together?