Frank,
If I remember correctly, the swivel joint was made from a pool cue ball. The arm is so slim to minimize the effects of water pressure wanting to push it back into the submersible. You had to fight the pressure to push the arm outward. Vance may be able to lend further information.
R/Jay
Respectfully,
Jay K. Jeffries
Andros Is., Bahamas
Talk sense to a fool and he calls you foolish.
- Euripides (484 BC - 406 BC)
Hi Dean. How's the sub coming along? This sure is an expensive hobby! Do you have any new pictures up?
That arm looks cool, although maybe a little fragile. It must be on some kind of ball socket. I wonder what a google search would turn up, or if those guys made it themselves. The sub was made by a tool and die shop so they could have made the socket. It must be fairly complicated, because they have a linkage there to close the grabber fingers, as well as swivel the arm around. I'll need to think about that one for a while.
I'm looking for a deal on three large scuba tanks. 100 cu. ft. minimum. Got any leads? I see ebay has some for $279, ( new, steel ) which isn't too bad. Should be ready to get those pretty soon so I can begin the plumbing on the sub. I'll also need a couple of 40's for emergency, with regulators.
Anyway, keep working on that thing and maybe we'll get together again for a couple dives in our subs.
It's only a deal if it's where you want to go. Find your travel deal here.