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Tool Talk Discussion Forum

Re: Best Way to Drill Large Hole

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Eric in IL

06-11-2013 16:25:18

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Scrolling through the comments, I found one I really like. I bet Butch(OH) has drilled a hole or two.

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06-12-2013 06:58:24

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 Re: Best Way to Drill Large Hole in reply to Eric in IL, 06-11-2013 16:25:18  
Thanks, Yes I have turned a few tons of steel into turnings over the years. I know what works for me but sometimes it doesn"t work out my way when others are doing the work so I make suggestions based upon my guessing the skills and equipment of those who ask. Actually I don"t pilot drill anything below 1". I thin the webs of my large bits so they start and feed easily but you cant tell somebody who doesn"t know how to thin the webs that they should do that can you? A pilot bit is the next best choice (which is not a step drill in my nomenclature) In the shop we now run spades that pilot in a 1" Hole for anything 1-3" and anything over 3" pilots on a 2" hole. Really nice system but beyond the average guys pocketbook or needs and certainly not for hand held equipment.

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jon f mn

06-11-2013 17:16:09

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 Re: Best Way to Drill Large Hole in reply to Eric in IL, 06-11-2013 16:25:18  
I've drilled a lot of hole too and I agree. To large of pilot hole and you can damage the bit. I always use 1/4" for holes up to 1".

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