LumberJocks

Jig Blog #3: Another Shaper Dough Nut or is it Donut?

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Blog entry by robscastle posted 10-01-2015 08:03 AM 5230 reads 0 times favorited 5 comments Add to Favorites Watch
« Part 2: Jig for the Ute Box Lid Part 3 of Jig Blog series no next part

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



5 comments so far

View CFrye's profile

CFrye

8738 posts in 1300 days


#1 posted 10-01-2015 08:27 AM

Um, what’s it supposed to do, Rob?

-- God bless, Candy

View robscastle's profile

robscastle

3390 posts in 1665 days


#2 posted 10-01-2015 08:37 AM

Opps,

the router bit only protrouds a few mm through the front of the donut hence making a very shallow cut in the concave material, which is unable to be done with a straight fence or I guess if you could find a large enough bearing it would do the same.

Another picture after use.

The set up is static in a vice for further explanation, (I hope !!!)

-- Regards Robert

View CFrye's profile

CFrye

8738 posts in 1300 days


#3 posted 10-01-2015 09:10 AM

OH! Now I see. Pretty clever. What didn’t you like about the results? And as to your last question in the opening post…I don’t care how you spell the sugary kind as long as you share!

-- God bless, Candy

View stefang's profile

stefang

15512 posts in 2795 days


#4 posted 10-03-2015 12:39 PM

Maybe the radius of the doughnut should have be the same as the workpiece? Good thinking Rob, but maybe a hand tool could do the job as well (ok, I admit that I don’t love routers and I only use them when nothing else will work).

-- Mike, an American living in Norway.

View robscastle's profile

robscastle

3390 posts in 1665 days


#5 posted 10-04-2015 07:58 AM

Good thinking Mike all I really needed to do was trace the caul profile and drill a hole!

Oh well some people are not really bright at times!!

-- Regards Robert

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