adrian65
Cave Dweller
Arch to golden memories and to great friends.
Member since February 2007
Posts: 10,777
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Post by adrian65 on Apr 15, 2009 13:08:58 GMT -5
Hi, everyone.
I think the title says it all. I have a small, thin blade that hammers because it's wore uneven on its circumference. Is there any method to make it round and smooth again?
Thank you, Adrian
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Post by catmandewe on Apr 15, 2009 13:20:37 GMT -5
Hey Adrian, Usually hammering occurs when the arbor hole gets oblong or egg shaped. Check that first before you go to to trying to machine the blade down. If it is not the arbor, you should be able to use an old grinding wheel to grind the rest of the blade back down, although it will shorten your blade life considerably. If the hammering is not affecting the cut or the blade, I would let it go. I have one saw that hammers no matter what blade I put on it, it has hammered for a year, but it still makes good smooth cuts. Must be something with the arbor or something, because I have checked everything else.
Good luck with it..................Tony
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adrian65
Cave Dweller
Arch to golden memories and to great friends.
Member since February 2007
Posts: 10,777
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Post by adrian65 on Apr 15, 2009 14:40:51 GMT -5
Thank you Tony, in my case the outside seems to be oval and yes, it botheres me because it's the blade that I use for the groove wrapping, thus requiring a pretty good precision and a smooth cut. I'm affraid that the hammering could chip the cabs while grooving them.
I think I'll try to use a grinding wheel, I suppose I have to hold it against the spinning blade that I want to correct, is it?
Adrian
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Post by Woodyrock on Apr 15, 2009 15:20:39 GMT -5
Adrian: Trueing up a diamond blade will be just like trueing up Silicon wheels. JUst hod the stone steady against the blade without letting it ride on the blade. The stone should just touch the high spot, slowly moving in until it no longer ticks as the high spot touchs the stone. If you let the stone ride on the blade edge, it will only wear it down without trueing it up. Woody
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Post by mohs on Apr 15, 2009 15:58:33 GMT -5
To Tony question If the blade your using is true and still hammers Then it must be that the spindle as run out or the collets your using (if any ) are not true and flat.
Adrian your problem could originate there also I haven’t been around wet saws much But I have hammer’d a few wood cutting circular blades
Difficult for me to imagine the diamond grit on the rim getting lopsided if the spindle and blade are running true. I suppose it can load up tho? so woody would have the solution to that
Anyway if either the blade or the spindle as run out it needs correcting and easy way to check would be
with the the motor off grab the spindle & move it side to side to see if there any play in the bearing then run the spindle without the blade on-- Feel it with your fingers to see if feels smooth and in round
If that is:
mount the blade and if you can spin it freely Eye it to see if there is wobble Or hold a sharpie marker to the side of the blade within close tolerance - spin it- and see if it marks a circular high and low spot
Hammering a blade is whole another subject
i didn't think of an out of balance blade what diameter blades are these?
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Post by catmandewe on Apr 15, 2009 21:34:28 GMT -5
Adrian, Yes hold it against the spinning blade. Go slow, so as not to overheat it. You will feel it smooth out after you have gone far enough.
Deep, Nope neither of those. I already checked both of those. Put new bearings on too, and in one of my conversations with Harley, he told me how to fix it. He even sent me a nifty little tool that I can put in my vise and true up the spindle and the collet with. Did both of those, still hammers, doesn't really hurt anything, so I let it hammer away.
Tony
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