They are easy to make from scrap wood, a number of us here have built them. This one is BRW and cherry.
Colin
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| What is this tool ? http://www.luthiersforum.com/forum/viewtopic.php?f=10101&t=26352 |
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| Author: | John A [ Thu Mar 04, 2010 8:20 am ] |
| Post subject: | What is this tool ? |
Hi - I saw this in the Romanillos video posted by Guitar Gourmet - what is this tool ? Looks like he is marking the soundboard for the rosette with it. The next scene he is chiseling out the space betweens the lines he marked. Is this tool available to buy somewhere ? thanks john |
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| Author: | Pete Brown [ Thu Mar 04, 2010 8:31 am ] |
| Post subject: | Re: What is this tool ? |
This is a link to the equivalent tool offered by LMI: http://www.lmii.com/CartTwo/thirdproducts.asp?NameProdHeader=Rosette/Circle+Cutter Attachment: circlecut.jpg
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| Author: | wolfsearcher [ Thu Mar 04, 2010 10:11 am ] |
| Post subject: | Re: What is this tool ? |
hi you can make one easily from a carpenters marking guage |
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| Author: | Colin S [ Thu Mar 04, 2010 10:21 am ] |
| Post subject: | Re: What is this tool ? |
They are easy to make from scrap wood, a number of us here have built them. This one is BRW and cherry. Colin
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| Author: | justink [ Thu Mar 04, 2010 2:58 pm ] |
| Post subject: | Re: What is this tool ? |
I built this one out of white oak. It is a bit rough - but it works pretty well, still. I also use it to "route" (with help of a chisel) all my binding and purf chanels on the body. |
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| Author: | Colin North [ Thu Mar 04, 2010 5:34 pm ] |
| Post subject: | Re: What is this tool ? |
justink wrote: I built this one out of white oak. It is a bit rough - but it works pretty well, still. I also use it to "route" (with help of a chisel) all my binding and purf chanels on the body. I was just thinking to make something similar for cutting plastic pickguards for the soundhole bit. You just gave me two other uses for it, 3 in 1 so far. This is my kind of tool!  .Good timing guys. ![[:Y:]](./images/smilies/smiley20.gif "Thumbs Up")
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| Author: | Hesh [ Thu Mar 04, 2010 6:00 pm ] |
| Post subject: | Re: What is this tool ? |
Colin S wrote: This one is BRW and cherry. Beautiful! |
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| Author: | justink [ Fri Mar 05, 2010 3:36 pm ] |
| Post subject: | Re: What is this tool ? |
Colin, Yeah it works pretty well. I saw a picture of it in Guitar Maker's Workshop - or some other similar book at Barnes and Noble. I use it for everything - cutting rosette channels, rosette materials, binding channels, purf channels, marking gauge, etc. and probably in the future for pickgaurd material too. I need to remake it with a bit more care and I think I would not use big, dumb metal screws this time. I also really like the idea of using a metal rod/dowel for the pivot like that beautiful Brazilian one above. These things make great beginner projects to hone hand tool skills and an eye for detail. |
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| Author: | Colin North [ Sat Mar 06, 2010 6:57 am ] |
| Post subject: | Re: What is this tool ? |
justink wrote: Colin, Yeah it works pretty well. I saw a picture of it in Guitar Maker's Workshop - or some other similar book at Barnes and Noble. I use it for everything - cutting rosette channels, rosette materials, binding channels, purf channels, marking gauge, etc. and probably in the future for pickgaurd material too. I need to remake it with a bit more care and I think I would not use big, dumb metal screws this time. I also really like the idea of using a metal rod/dowel for the pivot like that beautiful Brazilian one above. These things make great beginner projects to hone hand tool skills and an eye for detail. Yes (Justin?), I have the Workshop book, must have a look. It would be good if I had some offcuts of nice woods to use for tools and jigs, but every piece I have is tonewood in guitar sized pieces, and all jigs etc I have made are first/second time builds to tryout, mostly birch ply, lumber and MDF. Got to keep an eye out for some old, scratched solid hardwood furniture going cheap, to cut up.  Colin |
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| Author: | David LaPlante [ Sat Mar 06, 2010 11:08 am ] |
| Post subject: | Re: What is this tool ? |
I use the LMI cutter pictured above which works well though it's awkward to adjust the radius as well as the cut depth......hard to see the blade too when you are using it.. These all work best when you make the cuts in four separate arcs following the grain of the top. Cutting against the grain may result in a ragged edge. i.e.-with 3 and 9 o'clock being along the center line swing your cuts; 9 o'clock to 12 3 o'clock to 12 9 0'clock to 6 3 0'clock to 6 make the cuts shallow at first progressing to the full depth set of the blade. Too deep too fast and you can "plow" the grain with the blade (make sure it's really sharp). I use a Stew Mac rosette jig and dremel to remove the bulk of the material to depth keeping clear of the cuts and finish up with and exacto blade to remove the last little web between. oh yes, and make sure the bevel on the blade is set on the waste side with the flat side against the finished cut. |
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