Drill a hole the size of radius in wood 1/2" long, cut out 110 degrees, glue sandpaper in 'cup'.You could knock it down with a scraper first. At least in theory...
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| Wanted - A Technique for Uniform Radius on Plastic Bindings http://www.luthiersforum.com/forum/viewtopic.php?f=10101&t=21482 |
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| Author: | Ken Grunst [ Sun Mar 15, 2009 3:35 pm ] |
| Post subject: | Wanted - A Technique for Uniform Radius on Plastic Bindings |
I'm just getting ready to scrape bindings and purflings I have glued on several guitars I have underway. How do you get a uniform radius on the edge of the binding so that it's consistent all the way around the body? I've usually used a scraper, but is there a better way to make the consistently rounded edge? I'd appreciate your suggestions. Ken Grunst Williamsburg, VA |
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| Author: | Frei [ Sun Mar 15, 2009 5:08 pm ] |
| Post subject: | Re: Wanted - A Technique for Uniform Radius on Plastic Bindings |
Drill a hole the size of radius in wood 1/2" long, cut out 110 degrees, glue sandpaper in 'cup'.You could knock it down with a scraper first. At least in theory...
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| Author: | Darrel Friesen [ Sun Mar 15, 2009 6:37 pm ] |
| Post subject: | Re: Wanted - A Technique for Uniform Radius on Plastic Bindings |
I use the rubber concave sanding blocks from Lee Valley. |
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| Author: | bluescreek [ Sun Mar 15, 2009 6:54 pm ] |
| Post subject: | Re: Wanted - A Technique for Uniform Radius on Plastic Bindings |
I never get too worried about the radiusing. The edges will break nicely as you sand . |
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| Author: | Tai Fu [ Mon Mar 16, 2009 4:29 am ] |
| Post subject: | Re: Wanted - A Technique for Uniform Radius on Plastic Bindings |
router?? |
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| Author: | npalen [ Mon Mar 16, 2009 10:08 am ] |
| Post subject: | Re: Wanted - A Technique for Uniform Radius on Plastic Bindings |
I do them by hand but it does take practice and patience to get a uniform look. Wonder if a person could use a setup same as or similar to binding rabbet routing with a small corner rounder? Nelson Palen |
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| Author: | Mike_P [ Mon Mar 16, 2009 7:14 pm ] |
| Post subject: | Re: Wanted - A Technique for Uniform Radius on Plastic Bindings |
a 1/16" roundover bit might be a tad too much, or might be just right for your tastes....that's the smallest made.... |
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| Author: | Dave Stewart [ Tue Mar 17, 2009 8:23 am ] |
| Post subject: | Re: Wanted - A Technique for Uniform Radius on Plastic Bindings |
I just use a scraper, but to stay uniform, I'll do a "primary" (ie 45) bevel all 'round. Then ease with "secondary" bevels before sanding smooth. (I find bevels are easier to check for consistancy & keep the shape truer.) |
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| Author: | Ken Grunst [ Thu Mar 19, 2009 7:58 pm ] |
| Post subject: | Re: Wanted - A Technique for Uniform Radius on Plastic Bindings |
Thanks guys: I'm having pretty good luck with this group of guitars using a scraper and cutting several light bevels, and then sanding to a near-round finished edge. I tried Frei's method and I think it worked really well once I got the right sized tool made. I ended up doing quite a bit of bevelling first, and then finished them with this special sanding block. I tried if first without the scraper, but it was way too slow. Ultimately, I'd like to experiment with a router, because I really want a perfect quarter-round edge, but I guess I'm still a little gun shy. There's just no room for mistakes after this many hours of work getting a guitar body to this stage. Thanks everyone. I really appreciate the sharing here on the Forum. Ken Grunst Williamsburg, VA |
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| Author: | jordan aceto [ Thu Mar 19, 2009 8:17 pm ] |
| Post subject: | Re: Wanted - A Technique for Uniform Radius on Plastic Bindings |
One nifty trick, after beveling and refining with a scraper like Dave Stewart outlined, is to use 1/3 or so of a sheet of 220 or 320 sandpaper "shoeshine style" around the body. It makes for nice uniformly round binding edges if done attentively. |
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| Author: | John Mayes [ Thu Mar 19, 2009 11:56 pm ] |
| Post subject: | Re: Wanted - A Technique for Uniform Radius on Plastic Bindings |
I've tried to do it with a .0625 roundover chucked up in a jig just like what routes the binding. I tried many different ways. It just didn't work. Never would come out totally even. Especially with plastic binding it's easy to do it by hand. I get a 45 degree with a small scraper, then blend the sharp edges in. Practice and it's a snap. |
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