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Posted in response to Re: Bent diamond blade from Bob Place on October 31, 2011 at 03:21:14:

Re: Re: Bent diamond blade

CONYTINUE "Blade Straightening"....I hope I'm allowed to do ythis...

OK... We turn over the tin can top, and tap in a spiral manner ( as JOE DAVIS said) widening the spiral till we get to the rim ( MIND THE DIAMONDS !! ) A good tool to have on hand is a two or three foot stainless steel ruler (or a 12-inch for smaller blades).. to use as a straight edge. You will notice the "dish" on your can top has lessened in severity quite a bit..
ON TO THE REAL BLADE
When you do this with your blade ( or "practice" blade), you will notice that when you tap, there is a "spring" in the blade, and it re-bounds from your taps a bit..

DO NOT USE HEAVY BLOWS !! The word is "TAP".. Yes, its tedious, but when I'm doin my 24 " blade, I just think of the $100 U.S. I'm saving !! ..It helps to keep me focused!!
After each set of taps outward to..(Just before) the rim ..lift up the blade and put the straight edge across the Diameter of the blade. You should notice, the first time, that the greatest clearance between the blade and the straight edge is where it crosses the arbor hole area, (maybe 1/8' - 3/16"). Move ithe straight edge around the blade, 90 degrees at a time.. checking the clearance as you go,..it should be relatively the same around the blade. The clearance will lessen with each "tapping" pass you make..
THE GOAL IS TO GET THE CLEARANCE THE SAME (equal)ON BOTH SIDES OF THE BLADE WHEN THE STRAIGHT EDGE RESTS ON THE RAISED SURFACE OF THE DIAMOND RIM OR SEGMENTS..this is the NECESSARY "clearance" that the rim can now work IN, AND NOT BIND OR BURN THE SAW BLADE BODY.. as the rimhappily cuts your material..

..Hope this emboldens you'all... I'm on facebook, for questions..and have a look at Jam. agates there also !! PS..for Bob Place, its the people in Trinidad (1000 mile south east..that make musical instruments out of steel drums..!! AND, that is all about tapping and stretching metal too!! Happy Christmas.....
tony goffe, Jamaica ,West Indies)

From tony goffe - December 08, 2011 at 02:01:23
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Message: 70088



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