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brenbrenCT
 Post subject: curving a chisel
PostPosted: Thu Jun 16, 2011 8:24 am 
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First name: Brendan
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i seem to remember reading an article on frets.com about heating and bending a paring chisel for brace carving, without losing the temper.

I just spent a half hour looking for it, and i can't find it.

does someone have a link or advice on this?

thanks

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Pat Foster
 Post subject: Re: curving a chisel
PostPosted: Thu Jun 16, 2011 9:19 am 
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Brent,

Was it this article? He has several that mention heat treating.

http://www.frets.com/fretspages/Luthier/Technique/Banjo/WhyteLaydieFace/whytelaydieface.html

You can search a specific site from Google. Here's what I used to get the link:

site:frets.com "heat treating"

Also

http://www.frets.com/fretspages/luthier/Tools/BentTools/benttools.html

If you've made a donation for use of his site, you could email him and ask. Maybe even if you haven't.

Pat

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brenbrenCT
 Post subject: Re: curving a chisel
PostPosted: Thu Jun 16, 2011 9:25 am 
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Thanks Pat, i saw the bent tools one, but the first one was handy.

I'll email him

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Markus Schmid
 Post subject: Re: curving a chisel
PostPosted: Thu Jun 16, 2011 12:25 pm 
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You might have meant this:
http://www.frets.com/HomeShopTech/ShopTips/304.html

But it's on avoiding loss of temper when grinding, not bending. :roll:

Edit:
Now I've got the right link, I think:
http://www.frets.com/fretspages/Blogs/40D28/40d28_1.html#7
(scroll down to "Day 7: Spruce Upgrade" )
Clamp the chisel in a metal vise and let the vise jaws act as a heat absorber to protect the business end of the blade.
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brenbrenCT
 Post subject: Re: curving a chisel
PostPosted: Thu Jun 16, 2011 12:59 pm 
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Markus Schmid wrote:
You might have meant this:
http://www.frets.com/HomeShopTech/ShopTips/304.html

But it's on avoiding loss of temper when grinding, not bending. :roll:

Edit:
Now I've got the right link, I think:
http://www.frets.com/fretspages/Blogs/40D28/40d28_1.html#7
(scroll down to "Day 7: Spruce Upgrade" )
Clamp the chisel in a metal vise and let the vise jaws act as a heat absorber to protect the business end of the blade.



right on! that's the link i was looking for. thanks

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Cecil
 Post subject: Re: curving a chisel
PostPosted: Sat Jun 18, 2011 7:41 am 
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I had a friend and mentor, when I was a young man, who had a technique for welding small tempered parts that preserved their temper. Norman would simply insert the end that he wished to protect into a potato. It acted as a heat sink and kept it cool enough to not draw the temper. Might work.

Cecil
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Howard Klepper
 Post subject: Re: curving a chisel
PostPosted: Sat Jun 18, 2011 12:05 pm 
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brenbrenCT wrote:
i seem to remember reading an article on frets.com about heating and bending a paring chisel for brace carving, without losing the temper.

I just spent a half hour looking for it, and i can't find it.

does someone have a link or advice on this?

thanks


If you get a chisel hot enough to bend, you are going to anneal it. But hardening and tempering are not very difficult. Any book on blacksmithing will explain it.

I've never felt the need for a bent chisel for brace carving.

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banjopicks
 Post subject: Re: curving a chisel
PostPosted: Sun Jun 19, 2011 5:56 am 
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Todd Stock wrote:
It would not be a curved chisel thread without someone (me) jumping in to say that the sweep of the tool is the limiting factor that ends up fixing the end radius of the scallop or taper. If you can accept a little responsibility for defining that shape yourself, a double bevel carving chisel will give you a much broader range of curves with only a slightly steeper learning curve.


I don't understand the purpose of a double bevel or how it would shape a curve better that a single bevel. Any excuse to buy another chisel is OK with me though.

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