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| Help with pinhole champhering http://w-ww.luthiersforum.com/forum/viewtopic.php?f=10102&t=14149 |
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| Author: | John K [ Fri Oct 19, 2007 12:10 pm ] |
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I like to put a little champher around the pinholes on the bridge but have had a hard time avoiding chatter with the champher bits I own. I have one with 7 or 8 flutes and one with only one flute and a smooth tapered surface that I thought would ride on the surface and prevent chatter. The both chatter. Sometimes just a little, and sometimes so much that I have to resort to a tapered grind stone to smooth things out. There must be a tool out there that cuts champhers quickly and without chatter. TIA for your advice. John |
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| Author: | Blanchard [ Fri Oct 19, 2007 12:24 pm ] |
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John I had the same problem. I also tried multi-flute and single flute bits. I finally started getting clean champhers when my multi flute bit got dull after countersinking a bunch of holes in steel ! It doesn't cut very well now, it's slow and takes a lot of pressure, but it makes really smooth champhers. I know.... that's not the most elegant solution. Mark |
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| Author: | JJ Donohue [ Fri Oct 19, 2007 12:28 pm ] |
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John...I use a 1-flute with a sharp edge. I cut the champher on the raw bridge using a drill press before it is ever mounted to the guitar. I've never had any chatter. I've only used ebony and BRW so far. |
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| Author: | Andy Matthews [ Fri Oct 19, 2007 8:45 pm ] |
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I've never tried it, but I remember spotting it a while back and thinking it was worth a punt... Clicky |
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| Author: | TonyKarol [ Sat Oct 20, 2007 1:13 am ] |
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I use the similar styled 3/8 one from Lee Valley - works great, never used anything else. |
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| Author: | LuthierSupplier [ Sat Oct 20, 2007 1:55 am ] |
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Tony, I switched to the Lee Valley one because of a recommendation of a friend guitar builder and it has totally eliminated chatter. To me, this is the best bit on the market. Not very expensive either. You can get it HERE. It is the 3/8" bit. Good luck. Tracy |
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| Author: | John K [ Sat Oct 20, 2007 3:32 am ] |
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Thanks guys. Great suggestions. Mark I may try yours first because it is quick and cheap, but I think I am destined to get the Lee Valley job pretty quickly. JJ I like the idea of chaphering those holes before mounting and using the drill press instead of a hand held drill. I have horrible visions of slipping out of the hole and champhering the top. |
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| Author: | Marc Lupien [ Sat Oct 20, 2007 5:37 am ] |
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Hey John, Also from Lee Valley... It is a little expensive, but does a very good job. I have the 77J05.09 I believe!
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