Then why don't you just use a square bar. The extra weight of the inside
will not have this much influence as when applying big bar's vs. tubes.
(stifness to weight ratio ... ) this bar can be made at the size you want in
the material you like.

If you need a hole inside (cables or whatever) just drill (depending on the
length, but with these diameters, don't expect stifness from long tubes).

If all this doesn't work, try to change the problem otherwise: eliminate the
reason why it has to be so small, or the reason why it has to be square / a
tube .....

If you give more details on all sizes, stifness, cost ..., then we could
maybe help better.

Timothy

"Alex" schreef in bericht
m...
This is for swing arm. Very similar to the one on a desk lamp.

"Timothy" wrote in message
...
You could contact some large aluminum manufacturer, they exist also
smaller
but are not always in the catalogs.

What is the application?

Round tubes I have found very small in applications for the medical
sector.
(But also rather expensive)
Timothy

"Alex" schreef in bericht
.com...
I am looking for source(online or otherwise) small(less than 1/2")
steel
or
aluminum square tubing.
The smallest tubing most sources have is 1/2" which is too much for my
application.

BTW: I am in San Francisco Bay Area.