For several years I have been trying to figure out a way to use a router
to make fluted cuts in the tops of my hollow turnings, lidded vessels
and around the exterior edges of bowl. With the help of a few of
my engineer woodturning friends I came up with this rather simple device
which anyone could make.
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I first made an indexing jig that permits 72, 60 and 45 stops. It
is rather crude, but it works and it is quite accurate. I didn't
have an indexing machine to do it so I just measured every 5 degrees, 6
degrees and 8 degrees and marked them on a piece of MDF. I wasn't
smart enough to start the first hole of each ring on the same radius.
If I had it would be a simple thing to move from one ring to another if
I decided (for example) that 72 cuts were too many and wished to use 60
instead.
The table mounting for the router is a flat surface
(again of MDF) which has a dowel projecting below that fits into the
tool rest holder.
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The router is actually a trim router. Not only would a large router be
awkward it would be so large that it wouldn't be possible to center the
cutting bit unless you constructed a new lower tool rest holder.
It is mounted into a frame that has a flat bottom.
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The most difficult part is determining the cuts. I
place the router to the place that I wish to begin a cut, mark that
position then place the router where I wish to exit the cut and mark
that position. I then use a right angle piece which becomes a stop
and a guide for drawing the router through the cut. The cuts are
straight. Curves are very difficult.
I use a 45 degree 1/4 inch router bit which is set out far enough from
the router stand to allow sufficient projection in order to make the
cuts.
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I know that this is but a brief description, but perhaps
it will give you some ideas.
Thanks to Bill Johnston for sharing this great tip with
use. Bill is one of our
Artists in Residence and you can see more of his work here. You
also can email Bill at johnston@pinehurst.net.
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