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I am interested in doing a rounded over binding like Ed posted on his ‘Purfling Question’ tread. I am liking the look more each time I see it.

Just a quick question or two.

It almost looks to me like wider binding is used to get the look. Something like .09” or maybe .10”? How do you that use the technique do it?
Also, what radius bit do you like to use?

Thanks for the help.

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Joe Beaver
Maker of Sawdust

I just did one the other day. 220 grit on a soft sanding block and my close up glasses. Make sure you bolt the neck on before doing it because you don't want the round over to go beyond the FB. Don't ask how I know this. Mine wasn't quite as pronounced as that one but I like it.

Ed, I was thinking about doing it like that. It is the way I do my typical round over. Not so pronounced as the picture that Ed posted. I am thinking a big round over and not sure I trust myself to do it with a sanding block. Do you have any pics of yours?

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Joe Beaver
Maker of Sawdust

Try doing a very slight, 1/16", 45 degree chamfer with a file first, and then round over with a sanding block. It is much easier to get a consistant hand sanded round over this way.

Alex

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"Indecision is the key to flexibility" .... Bumper sticker

Depends on the wood for me. Curly maple, start with a rasp. Rosewood, start with a scraper. To take out rasp marks or ripples left from the scraper, hit it with coarse sandpaper on a cork lined sanding block, and a large dowel for the waist area. Then finish it up however you like (needle file, sandpaper with fingers, light scraping, whatever). Just use your eyes and fingers to monitor progress, it doesn't have to be a perfect circular radius. The rounding also doesn't have to be confined to the binding. You can cut into the purfling as well, or even the sides and/or soundboard to get a really soft rounding (just be careful not to sand through to the corner of the linings), so the binding width is only a matter of appearance.

That photo looks like .08" binding with .08" radius to me (i.e. just the binding rounded), although it's hard to tell from that camera angle. My preference is more like .100", I think. And I do prefer .09" bindings if I can get them to bend, but .08" is ok too.

I use a 1/8" radius round-over router bit raised up a little in my binding jig. Does a very neat job easily.

Pat

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There are three kinds of people:

Those that make things happen,
those that watch things happen,
and those that wondered what happened.

Dennis, I too am leaning toward a .10" binding. Seems it will allow for a more rounded look. I also like the sound of a 1/8" routed radius then finish with paper, etc. I'll have to experiment with files and a sanding block. That might be the ticket if I can get a consistent edge. So many choices

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Joe Beaver
Maker of Sawdust

I'd do it like Pat, 1/8" round over bit with about 4/5ths of the cutting edge below the plane of the router base. It'll leave a slight, sharp edge rather than a full quarter round on the face of the body, but you can just ease that with some 320 and avoid gouging into the face with the bit.

I have done thousands of round overs by hand and generally don't like using a block behind the paper. I like to let the paper flex a bit as it's moving across the corner. My two cents...

Anyone have any pictures they can post?

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Joe Beaver
Maker of Sawdust

Here's a trick I learned boat building in the 70's when everything was rounded over. Doesn't matter what the tool is - spokeshave, plane, file, or sandpaper - for every 7 strokes at a 45 degree angle, 2 strokes at a 22-1/2 degree angle either side of the 45 makes a very close to round roundover. Of course, the angles don't have to be exact. For this work I might use a file, go all the way around at the 45, then all the way around at the other two "facets", then hit it with fine sandpaper. Practice on scrap first!

I like the rounded over look. I am sure it makes finishing easier and then there is the comfort.

I found a file with a block of wood under the handle and a soft cloth under the wood will give a really nice radius, as the angle of the file continuously steepens as the wood block nears the side. It made possible running a radius that started from about 1/8 " inside the purfling on the sound board, gradually increasing the tightness (decreasing the radius of the curvature) as it approached the bound edge. It might take trying it to picture what I'm trying to describe.

It ended up giving a really pleasing appearance to the top as it gently fell off into the radius.

RN, That does sound interesting.

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Joe Beaver
Maker of Sawdust

Me really find it somewhat unbelievable that we is actually discussing how to break an edge on some wood.

However and non the less...me usually just gnaw at it with me teeth. Simple eh.

Ya Right!

So ya wanna see pics of rounded stuff eh...go here... more than just rounded off banding.

http://www.luthiersforum.com/forum/viewtopic.php?f=10128&t=28056&p=558544#p558544


blessings

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Audiences and dispensations on Thursdays ~ by appointment only.


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You are an amazing guy Padma, but nuts.

Yo,John...

Amazing eh? Gee thanks John.

However John,

To day is Mon Dec 30, 2013 so
me suggest you go to the user control panel
and change you log on name to something not so demanding on your being regarding you and your handle staying in touch with the error in time of our "current" Babylonian based calendar system.

According to Dr. Jose Arguelles, PhD. :

"Both the Gregorian calendar and the clock are based on the original Babylonian model which substituted a measurement of space for a measurement of time. Time is not space. Time is of the mind.

A circle on a flat plane divided into twelve 30-degree parts was used as a model for the annual calendar. A circle on a flat plane has 360 degrees (30 X 12). One annual orbit of the Earth around the Sun is 365 1/4 days. The measure of time according to the standard of the circle on a flat plane is irregular, arbitrary, and irrational. As is the measure of time, so is the measure of our mind. (That would include Your mind John)

Using the flat plane of 12, the clock doubled the 12 to 24 hours and the degrees from 30 to 60 minutes per hour. A clock does not measure time. A clock measures increments of space which, projected as increments of time, are valorized into monetary units. Money does not grow on trees. Money is a function of false time."

So, um, ya John...me may be crazy alright but me ain't stupid....You got anything ells you wanna comment on?


Blessings

_________________
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Audiences and dispensations on Thursdays ~ by appointment only.


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Yo Flipo...

Kottke ripped the line from Oscar Levant who said... “There's a fine line between genius and insanity. I have erased this line.”

Ya! and not only that Flipo...the real trick is to know which side of that line your on.
Furthermore...just who determines were that line is and by whos authority is it enforced? Hmmm ?

“Mediocrity knows nothing higher than itself; but talent instantly recognizes genius.”
― Arthur Conan Doyle

Just somethin to thinks about.

Wanna borrow my eraser?

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Audiences and dispensations on Thursdays ~ by appointment only.


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MIND BLOWN

YO John,

go take a laxative and this too will pass.

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Audiences and dispensations on Thursdays ~ by appointment only.


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