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> I got my tubing drawplate from Frei & Borel, too.
> It does the job in terms of useful sizes, but I do wish they had
> finished the inside surfaces of the holes a bit better.
Chuck a round wood toothpick into your flex shaft and apply a
dab of lapidary diamond compound, say, 8000 grit or so, and
polish up the inside of the holes in your drawplate easily
enough. the 8000 is fine enough that it will not remove
significant amounts of metal, but it will polish the hole. if
the holes are very rough, you might need to start with a 1200
grit first, but most plates are already surprisingly good,
despite what the wire/tube may look like.
Or, spend more money, and buy carbide drawplates. Frie and
Borel, Gesswien, and several other firms sell them. More
expensive, yes, but well worth the money. The round ones, at
least, come highly polished, and can produce wire or tube that is
mirror finished right from the plate. Plus, they take less
effort to draw, and the sizes are accurately marked right on the
plate. For those of you working in platinum, carbide drawplates
are worth their weight in gold... er. platinum... for the effort
they save in polishing the wire or tube.
Peter Rowe
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