if you have a piece of hex stock, put a setscrew in the middle of one of the
flats and bore/drill a hole to fit the major od of the old file.
lock the file with the setscrew onto a flat side of the file. holding the
flat side of the hex down on the grinder rest, stroke the file across the
face of the grinding wheel. rotate every other flat until the ground edges
start to meet.
I prefer a slight curve at the front of my scraper / burr knife but our tool
maker prefers the front end of his just on some kind of angle because of the
life he gets grinding it that way. I have made them also with the shank of
old drills that are large enough.

"doc" wrote in message
...

I have need of an old tool called a 3 cornered scaper. It is at first
sight, similar to a triangular file, with no teeth. Does anybody know
of a place in the UK where one can be purchased? Or failing that, I was
informed that such an implement can be manufactured from an
afformentioned triangular file, with the teeth ground off it by a
grinding wheel, and three fine edges left on it. Does anyone have any
experience of this.


--
doc