nightjar nightjar@ wrote:

I would use a router with a compass attachment - at its simplest, a piece of
metal or plastic sheet attached to the bottom plate of the router with a
hole for a screw at the centre of your circle.

I did try to think of a way of using a router for this, but was having
difficulty working out how to achieve the profile I wanted. You could do
it with a chamfer cutter, plunging progressively deeper as the radius of
the cut increases toward the edges of the post, but that would seem to
require the angle of the chamfer on the cutter to exactly match the
required angle on the shoulder of the newel. The other alternative I
considered was using a straight 1/4" cutter, and cutting a series of
stepped rings getting deeper as the radius increases. This would leave a
slightly simpler sanding job to remove the steps.



--
Cheers,

John.

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