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O.T.
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Welding bandsaw blades

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9Njoe

11-12-2001 16:52:52




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I have a metal cutting bandsaw I use in my shop. Over the years, I have accumulated quite a collection of broken blades. I buy pre-welded ones and go through about one a year to the tune of about 30 bux a piece.

I have a Miller Synchrowave 180 SD TIG welder in my shop along with an oxyacetylene torch.

My question is this, can you TIG weld these blades? If so, how do you aneal them after? I hate to throw them all away the good parts are still sharp.

Any Ideas?

Joe

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mikeNE.OH

11-13-2001 17:09:09




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 Re: O.T. - Welding bandsaw blades in reply to 9Njoe, 11-12-2001 16:52:52  
Set your tig welder to DC-Neg. @35amps..... use standard welding rod.(we have copper clad)and weld the thing together. use the torch to anneal and grind the weld smooth. We have a blade welder on our saw but some guys prefer to hand weld them. What ever you're comfortable with. I hope this helped..... ...Mike



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llamas

11-13-2001 03:55:48




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 Re: O.T. - Welding bandsaw blades in reply to 9Njoe, 11-12-2001 16:52:52  
I've done this with the heavier blades (like, 5/8 wide) used in a big Do-All bandsaw. I'd say they were about 0.060 thick. I fused the ends with about 30 amps of DC after clamping them to hold them straight. Grind smooth, then heat with a torch to a visible red, concentrating on the rear (toothless) edge and allow to cool naturally.

But the resistance butt welder usually used to make these is a better bet, plus it has the electric annealling cycle built in.

HTH

llater,

llamas

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Paul (WI)

11-12-2001 19:52:41




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 Re: O.T. - Welding bandsaw blades in reply to 9Njoe, 11-12-2001 16:52:52  
I buy my bandsaw blades from a welding supply store. They make them up at the needed length and weld them up. I take my broken ones back and they weld them up for me again. It has been awhile since I took one back, but I don't think that they even charged me for the reweld.



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genoF

11-12-2001 19:07:37




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 Re: O.T. - Welding bandsaw blades in reply to 9Njoe, 11-12-2001 16:52:52  
You really need a resistence welder that pushes the ends of the blades together and then grind off the flash and aneal by heating slowly to red hot and cooling very slowly.
One place I worked we did not have such a thing and we silver soldered them. Grind a long sloping bevel, about 3/8" long on each end, over lap them and silver solder,grind to correct thickness, and anneal.
Maybe you could buddy up with someone who works at a machine shop or tool and die shop nearby and have them weld the.
good luck, geno

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DON TX

11-12-2001 17:46:47




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 Re: O.T. - Welding bandsaw blades in reply to 9Njoe, 11-12-2001 16:52:52  
My experience with welding b/s blades with a built in anealer to grind the weld and heat the weld to the point of melting (red hot) and let it cool slowly(no water or oil). DON TX



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