I have read the many posts on this subject and haven’t seen
anything about seamless cast tubing.
If you do not require the strength or thinness of drawn tube and
don’t need pieces more than an inch or so, why not just cast it?
I have cast 4" in a vacuum setup. Plastic tubing and drinking
straws waxed to size (dip it in hot wax to build the thickness)
also hobby stores and building suppliers have tubing of various
sizes and shapes that will stink up your shop as they burn out.
For tiny tubing dip iron wire in wax and remove it after the
For round tubing a drill bit and wooden grit reamer cleans up
the inside. Chuck it in your FS and sand the outside. Square,
triangular and hex will take a little longer to finish. Stars
are a real pain.
I have never attempted to draw cast tubing as I have never
needed tubing by the foot. I’m sure with a lot of annealing and
gentle increments it could be accomplished though.
Anyone have that kind of time to experiment?
Hope this helps.
\ () || |/
web site: http://www.opalsinthebag.com
Vancouver, B.C. CANADA.