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David G. Nagel[_2_] David G. Nagel[_2_] is offline
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Default How to make a Spiral Groove in Column

Nova wrote:
eganders wrote:
I need to make a spiral groove in a couple of columns. I only have to
do it in two columns and I may not do another for a LONG time, so a
complex jig that will take room and time to build is not an attractive
approach.

An alternative way is to put a grid pattern on the column and join
points along the grid to make a spiral groove manually using gouges
and chisels. That is a possibility, but I am afraid of how tedious
this would be and my ability to make a clean, attractive groove using
this method.

I wonder if someone has a BLEND of a simple jig and a manual layout
that might use something like a follower groove as a path for a
follower arm attached to a router. Has anyone come up with something
like this?

If not, and the manual way is the way to go, is there someplace on the
web that goes through the steps for doing this that will help me be
successful?


Use a strip of heavy weight paper cut into a long strip and spiral the
strip around the column at the desired angle. Use a paper heavy enough
to prevent lateral flexing. Mark the edge of the paper. A course file
can be used to a major portion of the groove.

One of the TV woodworking shows had an episode on just this project. I
forget which one but a little research on the net should find which one.
It was a good show IMHO.

Dave Nagel