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Old 11-29-2012, 11:18 PM   #1
awarner322
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I built a jig (that seems to be working pretty well geometry wise) but it does not seem to be cutting all that well. Am I just not being patient enough? Or did I miss the boat with what cutting wheel I have? I just grabbed a 4 1/2" metal blade from harbor freight. Can anyone shed any light?

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Old 11-29-2012, 11:26 PM   #2
mattd2
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What thickness cut-off disc did you get? 1mm should be best for this. Also do not try and go through in one past, just keep going round and round a little deeper each time. I think I did mine in about 4-5 passes freehand.

Edit for more info: When you do finally start breaking through, watch out how far you let the disc drop into the cut. Again you want just the tip of the disc to go through outherwise the flat blade is being bent round the cut while spinning at 1500+ RPM = recipe for exploding discs!
And as normal for all working with power tools - make sure you have the right PPE = Saftey galsses/facesheild, gloves, hearing protection, long sleeves/pants, no loose fitting clothing and tie your hair back if it is long

 
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Old 11-29-2012, 11:34 PM   #3
slakwhere
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blade? is the cutting disk fiber or metal? you want fiber disks. like matt said, go around several times lightly scoring until you finally break through.

 
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Old 11-29-2012, 11:43 PM   #4
passedpawn
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Yep. Might take a few minutes and a dozen or more revolutions. I've got a bunch of notes here. I guess I'm repeating the guys above. Good luck.
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Old 11-30-2012, 12:05 AM   #5
awarner322
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http://www.harborfreight.com/4-12-de...tal-68137.html

this is what I grabbed...too thick and wrong material I'm guessing :/

 
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Old 11-30-2012, 12:25 AM   #6
passedpawn
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Quote:
Originally Posted by awarner322 View Post
http://www.harborfreight.com/4-12-de...tal-68137.html

this is what I grabbed...too thick and wrong material I'm guessing :/
Yea, I think that's pretty thick. I use DeWalt XP Extended 0.045", which is 1/3 of the thickness of yours.
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Old 11-30-2012, 12:27 AM   #7
slakwhere
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right material, wrong thickness. that is a grinding wheel for smoothing welds or removing large amounts of material.

you want the thin ones that require you use the hardware on the grinder to attach.

http://www.harborfreight.com/pack-of...tal-45430.html

 
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Old 11-30-2012, 12:31 AM   #8
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I use the DeWalt discs (.045" thickness) that also specify for use with stainless steel. They have NO issue cutting through a keg, top or top shroud/section.
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Old 11-30-2012, 12:42 AM   #9
mattd2
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Quote:
Originally Posted by slakwhere View Post
right material, wrong thickness. that is a grinding wheel for smoothing welds or removing large amounts of material...
I would be cautious calling it a grinding wheel as I have seen 3mm cut-offs (a plant I worked at restricted cut-off below 3mm because the thought shattering dics were a safety issue)

 
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Old 11-30-2012, 01:00 AM   #10
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Quote:
Originally Posted by mattd2 View Post
I would be cautious calling it a grinding wheel as I have seen 3mm cut-offs (a plant I worked at restricted cut-off below 3mm because the thought shattering dics were a safety issue)
They are a hazard. Those shards fly when it goes. Try pushing the disk into the work if you want to see it happen

Eye protection is mandatory with these things.
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