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 Post subject: Circle Cutter Jig
PostPosted: Mon Dec 10, 2012 3:32 pm 
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Joined: Tue Jan 03, 2006 1:47 pm
Posts: 1624
Location: United States
First name: Larry
Last Name: Hawes
Focus: Build
Status: Amateur
I posted this in the general forum not knowing this sub-forum existed. I think I might be living here for quite some time.

I would like to post this circle cutter I built yesterday in hopes others might find something useful as I have from your designs and hard work building jigs.

I'm no luthier nor a very good wood worker but got sick and tired of my Dremel tool wrecking work and being a general PIA so I decided to build a Circle Cutting jig for my Bosch Colt.

I discovered lots of jigs on the web and on this site and liked the simplicity of a wooden jig, but the micro adjustability of some other designs so I combined both worlds. I haven't mounted the Colt router yet but am very happy with how solid it came out.

I used poplar for the base since it is so soft and oak and scrap walnut for the other parts. All the bottom edges are eased to minimize damage t the guitar top and I was able to get the adjustment down to almost zero back lash on the wing nut adjustment so I hope to be able to creep up on some finer detail with rosettes than otherwise possible with a single wing nut adjustment in other designs.

Also the 2 wing nut hold downs really create a stable pin locator. I have yet to figure out to really get the 3/16" pin set solidly as it is just press fit currently.

I haven't cut a circle yet but will later today and let you all know how it works in practice.

Here's a couple of pics.

Image

Image



Image

Image

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 Post subject: Re: Circle Cutter Jig
PostPosted: Mon Dec 10, 2012 3:32 pm 
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Joined: Tue Jan 03, 2006 1:47 pm
Posts: 1624
Location: United States
First name: Larry
Last Name: Hawes
Focus: Build
Status: Amateur
Bottom view, needs epoxy clean-up.

Image

With Bosch Colt Mounted

Image
Image

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 Post subject: Re: Circle Cutter Jig
PostPosted: Mon Dec 10, 2012 3:33 pm 
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Joined: Tue Jan 03, 2006 1:47 pm
Posts: 1624
Location: United States
First name: Larry
Last Name: Hawes
Focus: Build
Status: Amateur
Here's link to a short discussion re: same on the general forum.

viewtopic.php?f=10101&t=38484

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 Post subject: Re: Circle Cutter Jig
PostPosted: Sat Dec 15, 2012 6:25 pm 
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Joined: Fri May 18, 2012 8:35 pm
Posts: 2658
Location: Austin, Texas
First name: Dan
Last Name: Smith
City: Round Rock
State: TX
Zip/Postal Code: 78681
Country: USA
Focus: Build
Status: Amateur
Very clever Larry,
It looks super-sturdy.

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 Post subject: Re: Circle Cutter Jig
PostPosted: Fri Jan 04, 2013 11:23 am 
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Joined: Sun Dec 30, 2012 12:54 pm
Posts: 9
First name: Alan
Last Name: Tobler
City: Tucson
State: Arizona
Zip/Postal Code: 85748
Country: USA
Focus: Build
Status: Semi-pro
Hey Larry, nice job on the circle cutter! [:Y:] Looks like it will serve you well.
I cut threads on the pins and holes of my circle jigs with a tap and die set. I made several jigs for sanding, routing, and scoring the rosettes and soundboards. The oak you used will take threads nicely. I used aluminum, hickory, and some white melalmine for bases and they threaded good as well.

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