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PostPosted: Fri Mar 19, 2010 6:14 pm 
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...what should you do before you grind and hone the bevel?

Ralph :wink:

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PostPosted: Fri Mar 19, 2010 6:28 pm 
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Flatten the back???

Horray!! I get the first new soggy point!!!

Welcome back, Ralph!!

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PostPosted: Fri Mar 19, 2010 6:37 pm 
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OK Larry you get the first soggy points all wrapped up in a soggy plain brown envelope :D Lets keep this going...

Why do you flatten the back?

Ralph :wink:

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PostPosted: Fri Mar 19, 2010 7:16 pm 
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IF the back is not flat the chisel will be curved and will not produce a true straight line, or cut, of the edge of the mortise will be cupped or curved.

Duan

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PostPosted: Fri Mar 19, 2010 8:03 pm 
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To insure that the chisel is sharp equaly all the way across the blade.

Rog

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PostPosted: Fri Mar 19, 2010 9:30 pm 
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A good edge requires two nice flat surfaces that intersect. A perfect bevel that meets an as-machined back looks like a mountain range when magnified...

Welcome back Ralph!


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PostPosted: Fri Mar 19, 2010 9:59 pm 
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I have a related question that I was wondering about earlier this week while sharpening

when you first sharpen a chisel is it important that you flatten the back first or can you do it after you hone the edge?

In my (very very limited experience) I flatten/clean up the sides first (and file the corners if appropriate such as with a smoothing plane iron), then the back, then the edge but the other day I did it differently because I was already at my sharpening wheel-- I did the hollow grind, then sides (I use sandpaper for the sides) then back, then microbevel. (again, on sandpaper)

Does it matter?
Thanks in advance
Lawrence


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PostPosted: Sat Mar 20, 2010 6:36 am 
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It's easiest???

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PostPosted: Sat Mar 20, 2010 5:25 pm 
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Woodsurfer gets the bonus points :-D When a chisel (or plane iron etc.) is new the finish is usually rather coarse. The back should be first flattened and then refined to a fine finish. The bevel can then be honed and polished to the same level producing a good cutting edge. The work on the back of the chisel need only be done once as all subsequent honing will be carried out in the bevel.

Lawrence

You should always refine the back when the tool is new and thereafter work on the bevel/micro bevel. I don't worry about the sides but I do remove the arris with a fine stone as these can become very sharp and will make lots of fine cuts in your fingers as you hold the chisel... DAMHIKT 8)

Ralph :wink:

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