Re: [ATM] Making a trepanning biscuit cutter

["Bob May" <bobmay@nethere.com>]

Trepanning cutters are easy to make although a bit touchy.
Start by taking a piece of wood (or metal or plastic if you wish)
and cutting a nice round side on it along with a nice mounting
hole in the middle.  Use a router or the table saw (rounding jig
setup) to get it good and round.  Then take some steel flashing
and screw it to the wood all the way around, making sure that the
flashing is vertical to the wood and isn't bowed out at any
point.  The edge of the flashing should run true to the method
that you're mounting it to the driver for it.  A little bit of
wobble won't hurt too much but you don't want to have a lot of
wobble or you'll be cutting a really big slot in the glass.  Cut
the triangular slots in the edge so that they push the grit into
the edge (reverse of what a cutting tooth is on a saw blade!) and
you're ready to start.
Bob May
bobmay at nethere.com
http: slash /nav.to slash bobmay
http: slash /bobmay dot astronomy.net
Replace the obvious words with the proper character.

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