ngr1

My Feedback: (2)

I made a couple of air control valves using a drill press, lathe, brass tubing and JB weld. The one without the setscrew worked great but I had to pinch the airlines in order to control the air pressure.

With my second one I followed Robart's design but found the a lot of air seeped between the thread and set screw rendering it disfunctional.

Any ideas on how the pros avoid this?

Any help would be appreciated.

Thanks

Norman

C_Watkins

My Feedback: (10)

You can give Teflon tape a try. It works wonders on stuff like this sometimes.
(Especially if it's a "set and forget" thing. It won't handle a lot of constant fiddling.)


If I were going to attempt something like this, I'd use a bolt that only had
threads at the very end, and a smooth shank the rest of the way up.

That way, you could machine in a receiver groove for an O-ring, and top
it off with a small flat cover held on by a couple of screws. That would do it.

rcalfred

Norman: I imagine that the "pros" just buy their valves from the manufacturers. And rely on them having worked all the kinks and problems out of their products before offering them to the public. Suggest you do the same. Regards.

MinnFlyer

My Feedback: (4)

Just coat the set screw with Vasaline. That should seal any air leaks.

ngr1

My Feedback: (2)

Thank you gentlemen, the Teflon tape worked great.

NR