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Drill bit sharpeners

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baron

01-12-2001 17:01:40




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Which brings to mind a question I've had for years.....How about the best way to salvage old dull bits? Any ideas on the BEST way to sharpen bits or is it not worthwhile??? thanks baron




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rhudson

01-13-2001 15:46:20




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 Re: drill bit sharpeners in reply to baron, 01-12-2001 17:01:40  
i know this is going to sound silly but. short people can generally learn to grind drills freehand before tall people. (good thing for me). to grind the correct positive rake angle on the end of the drill, the shank must be held downward from the tip. if you're towering over the grinding wheel the tendency is to point the end of the drill downward causing negative rake angle. if you dont have luck grinding drill. go to an old machinest and within about 2 hours training and practice, you'll have it down pat.

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Gordon

01-13-2001 11:56:02




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 Re: drill bit sharpeners in reply to baron, 01-12-2001 17:01:40  
Standard bench grinder with two wheels, fine and coarse. A good heavy duty grinder with 7 or 8 inch wheels is good. Learn how to sharpen drill bits "hand held", practice a lot, get good at it, impress your friends, save lots of money - never buy new drill bits again. You will be amazed what you can pick up (larger diameter high speeh drill bits included) at yard sales, garage sales, flea markets etc. really low priced (cheap). The grinder is great for a lot of other uses as well.

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Steve U.S. Alloys

01-13-2001 09:45:32




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 Re: drill bit sharpeners in reply to baron, 01-12-2001 17:01:40  
I can't sharpen a bit on the bench grinder to save my whatever. I really don't do it often enough for one thing. I use one of the Drill Doctors too.

I know something about the company because I also sell them. Darex has them from the home hobbyist type to the very precise and high production models for industrial users that run into the several thousand dollar range. I recommend the 2nd tier machine as you can replace parts. The $89.00 unit is a throw away.

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sammy the RED

01-13-2001 07:49:11




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 Re: drill bit sharpeners in reply to baron, 01-12-2001 17:01:40  
I do mine free hand on the bench grinder.



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Sopguy

01-13-2001 03:34:13




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 Re: drill bit sharpeners in reply to baron, 01-12-2001 17:01:40  
Hi Barron
If you have that many bits grab a handful and spend some time at the grinder.11 degrees is a good angle for steel.Respect your grinder.Become familiar with the geomertry of a drill bit.Quench your bit often when grinding.When you master grinding you can touch up your bit often greatly extending the life of your bits.Remeber the shorter the bit,the stronger,less likley to wander,always worth grinding.
Al

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Francis Z Beringer

01-12-2001 18:25:03




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 Re: drill bit sharpeners in reply to baron, 01-12-2001 17:01:40  
Have a Drill Doctor. It does 1/8 to 3/4. Really does a nice job.



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