des bromilow wrote:
G'day,

trying to make oval tubing from round tubing...

we're trying to make oval tubing (two half circles seperateed by
tangential parallel sides)
if we try squeezing the tubing we end up with the sidewalls folding in
on them selves, and the ends "pointing" themselve - the oval looks like
a squeezed figure eight

The tubing (with the same perimeter measurement) is 1.5" OD and less
than 1/16" wall thickness and we need pieces in the order of 24" long

On the presumption that a internal mandrel is used - how is it done?
Do we start with a round slip fit which gradually changes to the shape
we're interested in? Do we push it through, pull it, roll it?

unfortunately we're not looking at needing many of these, so specialist
manufacturing isn't an option.

Thanks,
Des
remove the German antispam device is replying directly




I would try packing the tube with sand before you try to squeeze it.

John