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Old 01-10-2014, 09:29 AM
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How do you sharpen your drill bits?

Hi Guys and Gals!!

Some of us do not have the gift to sharpen a drill bit worth a D**M and I'm one of them. I've read the book, watched the video, and had the expert show me but the drill Gods did not want me to succeed in doing it by hand. So while eyeing my bucket of broken or dull bits I'm thinking of buying a Drill Doctor 750. Anybody out there have one or what works for you? For what I've spent on bits thru the years I could probably could be driving a new Gremlin! ( They still make them don't they?)

BB

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Old 01-10-2014, 10:22 AM
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Quote:
Originally Posted by boothboy View Post
Hi Guys and Gals!!

Some of us do not have the gift to sharpen a drill bit worth a D**M and I'm one of them. I've read the book, watched the video, and had the expert show me but the drill Gods did not want me to succeed in doing it by hand. So while eyeing my bucket of broken or dull bits I'm thinking of buying a Drill Doctor 750. Anybody out there have one or what works for you? For what I've spent on bits thru the years I could probably could be driving a new Gremlin! ( They still make them don't they?)

BB

I got that exact same model for my b/d last year, seems to do a great job!

Russ
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Old 01-10-2014, 11:37 AM
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It sounds to me like you are not getting any clearance on the drill when you sharpen them. It's not that critical how you do it, but without any clearance behind the cutting lips it just won't work.
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Old 01-10-2014, 11:50 AM
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I own a drill doctor. If you are just buying the cheap black oxide bits you probably won't like the drill doctor. It does pretty decent on higher quality/premium bits but most of your black oxide bits are just hardened on the very tip so once they're sharpened you lose the hard surface. I would suggest buying a premium set of drill bits before I would suggest buying a drill doctor. I can do just as well on the bench grinder as the drill doctor does.
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Old 01-10-2014, 01:25 PM
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my neighbor got one as a gift and has no use for it, so he lets me use it
best thing since sliced bread.

when i sharpen a bit on the grinder, it's as good as drilling with a pipe nipple chucked up

drill doctor works well especially on 1/4 and up, smaller bits are harder to sharpen.
i just buy new for under 1/4''

gremlin? you'd choose a new gremlin???
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Old 01-10-2014, 01:32 PM
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Quote:
Originally Posted by ogre View Post
my neighbor got one as a gift and has no use for it, so he lets me use it
best thing since sliced bread.

when i sharpen a bit on the grinder, it's as good as drilling with a pipe nipple chucked up

drill doctor works well especially on 1/4 and up, smaller bits are harder to sharpen.
i just buy new for under 1/4''

gremlin? you'd choose a new gremlin???
Who wouldn't!!

BB
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Old 01-10-2014, 01:34 PM
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gremlin? you'd choose a new gremlin??
Never owned one, but I suspect you could make a pretty fast little street/strip car with the 401 motor and a few aftermarket goodies. Randall American in Mesa, Arizona used to sell them new as a dealer-built hot rod.
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Old 01-10-2014, 02:02 PM
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Watch this and if you still can't get it right then ummm...I don't know what to tell ya!


Watch all three segments.
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Old 01-10-2014, 03:38 PM
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Old 01-10-2014, 04:40 PM
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Once you figure out a couple of quirks with a Drill Doctor, they work just fine. I'll go as small as 3/16" up to ~17/32"nds but just buy new under that small size. I don't have the bigger chuck so the few that I have over the 17/32" do by hand.
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Old 01-10-2014, 05:24 PM
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general & doctor.

I use my drill doctor for 1/2 and smaller bits, It works good. for larger bits I use a general and a 10 in disc on my combinationg 6 X 48 belt and disc sander. with the general you have to adjust it for each size and it only sharpens one side at a time, For bits larger tha 1 in I eyeball them using methods from my college machine shop class, and give them some back relief.
In the youtube video He did not like the General. I have been using one for 30 years and have been successful with it.

General Tools and Instruments
http://www.generaltools.com/assets/i...825_Manual.pdf

I have some old hand brace bits and braces from My grandfather, Hand bits have a sharper angle and more back relief. About 40 years ago I was helping Fords director of Special Vehicle Operations rebuild the trailer for his 427 Cobra. I grabbed a hand brace and bit and was drilling holes as fast as he was with an electric drill

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Old 01-10-2014, 05:43 PM
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I have a drill dr. and it is great.I never have had any luck sharpening on the grinding wheel.Now my eyesight isn't the best,so it's even harder to hand sharpen bits.
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Old 01-10-2014, 06:35 PM
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I also have a drill doctor and a sharpen fixture mounted on one grinder; One of the lessons learned in high school shop class in the sixties, was how to free hand grind a drill bit. So I usually do touch ups by hand. Except the 1/8" and smaller as I can no longer see them to sharpen..
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Old 01-10-2014, 07:53 PM
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I have had a Drill Dr for about 10 years BB. It has paid for itself 3 times over in how many drill bits I buy.

You will not regret getting one.

John
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Old 01-10-2014, 09:18 PM
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great thread. I just use the bosses bits-lol I do have what's left of my cobalt set and a couple of them are dull. I'll look into the drill doctor cause I've been thinking about getting a new set of cobalt bits and keep em stashed at my house like a hoarder.
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