I made this jig to enable me to re-route the common stress relief recesses in floor boards that I was using.
I am making a box from floorboard off cuts for a friend as a house warming gift but its an unfinished project at the moment so more on it later.
The box has a curved handle on the lid and its the concave section that I needed to do some additional finish work on.
First up I clamped up the material that I used for the handle to produce the required curve.
It was then upon releasing it from the clamp I saw I needed to do improvement work the concave surface.
So the the donut jig commenced.
I used a reasonably large piece of timber so as to be able to clamp it on the table and use it as a fence.
I traced a curve from a paint tin onto the timber and then cut it out on the bandsaw.
I then cut a 38mm hole with a forstner to accomodate the router bit
Fitted it all up and then raised the bit to exit the donut in the respective location.
Here is a shot of the handle and the work area I wanted to improve on
The jig worked well and cleaned out the recess nicely.
The bit I used was a 1/2” round over bit but only using the straight cutting edge part, any other suitable bit would work just as well.
Unfortunately when I finished it all I didnt like the result so I used the linisher to sand it smooth again, oh well these things happen.
Interest comment: Who knows the correct terminology? Dough nut or Donut.
-- Regards Robert