Ah...thank you sir
...I never would have thought of the "downslope to the grain" issue....I am off to read your toot...thanks for answering .big John
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| side sound ports and oval sound holes http://www.luthiersforum.com/forum/viewtopic.php?f=10101&t=18137 |
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| Author: | klepsap [ Sun Jul 27, 2008 3:52 am ] |
| Post subject: | side sound ports and oval sound holes |
Just curious to know some of the methods used to create sound ports on the curve of a side and also how oval sound holes and oval rosettes come together? |
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| Author: | Howard Klepper [ Sun Jul 27, 2008 1:06 pm ] |
| Post subject: | Re: side sound ports and oval sound holes |
Side port: Forstner or sawtooth bit, from the inside. Oval soundhole or rosette: router and template. |
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| Author: | Big John [ Sun Jul 27, 2008 1:47 pm ] |
| Post subject: | Re: side sound ports and oval sound holes |
Howard, why drill from the inside? peace and respect big John |
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| Author: | phil [ Sun Jul 27, 2008 3:10 pm ] |
| Post subject: | Re: side sound ports and oval sound holes |
you can check out past threads to read howard's explanation about drilling from the inside. another option for a soundport is to use a dremel with a spiral bit. i just did one this way and it worked great. i had the dremel mounted in stewmac's base. my shape was an elipse. but if you want a perfect circle, i'm certain that howard method makes the most sense. phil |
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| Author: | Todd Rose [ Sun Jul 27, 2008 9:42 pm ] |
| Post subject: | Re: side sound ports and oval sound holes |
After drilling a hole for a side sound port, you can then enlarge and shape it with a little sanding drum on a dremel. |
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| Author: | Howard Klepper [ Sun Jul 27, 2008 11:42 pm ] |
| Post subject: | Re: side sound ports and oval sound holes |
Less splitting, because you are cutting downslope to the grain, due to the curve of the side. Ordinarily you get less splitting on the entrance than on the exit. The curve makes this work differently. Still good to have the wood backed up with a formed block on the exit side. |
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| Author: | Big John [ Mon Jul 28, 2008 11:49 am ] |
| Post subject: | Re: side sound ports and oval sound holes |
Ah...thank you sir ...I never would have thought of the "downslope to the grain" issue....I am off to read your toot...thanks for answering .big John |
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| Author: | Ricardo [ Mon Jul 28, 2008 1:07 pm ] |
| Post subject: | Re: side sound ports and oval sound holes |
I use a dremel with router type base. Attachment: P1040044.jpg
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| Author: | TonyKarol [ Mon Jul 28, 2008 5:30 pm ] |
| Post subject: | Re: side sound ports and oval sound holes |
This jig, with a downcut spiral, slowly - no tear out - (I have even done this on finished guitars, and no finish marring either) .. usually after the two coats of zpoxy are done .. quick sand, then the thinned coat of zpoxy, then finish. |
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| Author: | TonyKarol [ Mon Jul 28, 2008 5:31 pm ] |
| Post subject: | Re: side sound ports and oval sound holes |
I also have templates for other shapes as well ... BTW, it uses a template guide on the lam trimmer base, I usually go 1/2 inch guide, 1/4 inch bit. Another pic .... |
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