This is an easy one. Go to the hardware store with your calipers. Look at
the pipe clamps. They use exactly this type of set up.

--

__
Roger Shoaf

Important factors in selecting a mate:
1] Depth of gene pool
2] Position on the food chain.



"Grant Erwin" wrote in message
...
I've seen blacksmiths make forge stock stands using a trick: the stand's
vertical member is a tube (e.g. 1/2" pipe) and the vertically adjusting
member
is a rod (e.g. 1/2" round bar) which slides in the pipe. The top of the
pipe is
cut at an angle and there is a washer slipped over the pipe. As you lift
the
pipe, the washer rattles down, but when you let go of the pipe the washer
is
forced to an angle and binds on the pipe. When you get it where you want
it,
then (and only then) does the user tighten the threaded T-handle clamp on
the side.

My question is, does anyone know how to design this angled washer setup?
How
angled should it be? How much bigger than the vertical rod should the hole
in
the washer be?

Grant Erwin -- trying to not reinvent the wheel