Sharpening dull drill bits

I might have to give that a try. My metal lathe has been doing a good job but it takes a while to get the stone angled right.
 
I've been considering a Drill Doctor, but this is far less expensive... Has anybody compared the two??
Rashid11 - what type of stone do you have in your grinder?
Thanks for the info!
 
Maybeso said:
I've been considering a Drill Doctor, but this is far less expensive... Has anybody compared the two??
Rashid11 - what type of stone do you have in your grinder?
Thanks for the info!
Click to expand...


Let me put it this way, the tool in this thread has been around for 50+ years and there was still a great need for the drill doctor. ;)

That tells me something.:D

http://www.drilldoctor.com/
 
I'm not smart enough to use one of those, I have to use a Drill Doctor. I believe it has paid for it's self more than once....
 
There is a good chapter in the Machinest Handbook on how to sharpen bits. You can adjust the grind to the material. It often takes less time to sharpen a bit than it does to plug a drill doctor into AC. Drill bits are just round twisted knives...Ed
 
To answer the stone question:

- I use the jig right on my belt grinder - clamp it to the support,
load in the sick drill bit, 20 seconds later I am done. And you watch
the whole magic happen right in front of you. Grinding against flat
platen.

I use 220 grit to do it, Norton hogger, figured ceramics would cut
cooler.

It does fly.

For the price they sell it at, you'd never beleive it actually works
as well as it does.

I too, looked @ drill doc, but was hard pressed to justify the spend.
$12 was much easier on the wallet.
 
I scored the nicer Drill Dr that's one step from their top on an Amazon Friday sale refurbed for $60.00! That thing rocks. I love it! I restored a box of worn drill that I've been collecting for nearly 20 years back to serviceable tools.

The little adaptor thing that started this thread, well, I have one LNIB that I'd ship to someone for the cost of shipping if anyone is interested.
 
i love my drill doctor. with all the bigger metal cutting drill bits i use for auto fab stuff....it has way more than paid for itself.
 
I bought and love the drill doctor. I havent had to buy an eighth inch drill bit in over a year. I had a few of them and have just kept sharpening them. spend the extra money and get the doctor. I can completely sharpen a bit in about 30 seconds, far less time than it would take to set that other contraption up.
 
i got the deluxe top of the line drill dr. its great i have the grizzly junk also you can have if ya pay for shipping save your postage is my advice
bb
 
How does the Grizzly thing get the chisel centered & the relief angles right? (Not that I'm touting the Doctor thing, mind you - I'm a Machinery's
Handbook fan.)
 
Ed Schempp said:
There is a good chapter in the Machinest Handbook on how to sharpen bits. You can adjust the grind to the material. It often takes less time to sharpen a bit than it does to plug a drill doctor into AC. Drill bits are just round twisted knives...Ed
Click to expand...

I just learned last week how to sharpen my drill bits. a few years ago a machinist had shown me how but i never took the time to practice, well last week i spent about an hour with some old drill bit (even a few broken 1/16) and now i can sharpen one in a mater of seconds and they work great.
 
I've been sharpening my bits by eye for so long now I would not know the luxury of using a drill doctor. :(

Recently, I've been experimenting with the import bits from MSC. They are dead cheap and although they are Chinese, they bore a decent hole - even in Ti! Since everything I use them for is either threaded or reamed, any loss of concentricity is very VERY minor. I've been really inspecting the bits under magnification and I have to say I am impressed with the sharpness, and the finish... for the price. Obviously, American and Japanese bits as far superior in all areas, but these bits are disposable and the do a great job.

I'm getting the HSS bits with the polished flutes, and they work great. When they get dull, I cut the shanks off and use them for alignment pins, or just toss them.
 
Ed Schempp said:
There is a good chapter in the Machinest Handbook on how to sharpen bits. You can adjust the grind to the material. It often takes less time to sharpen a bit than it does to plug a drill doctor into AC. Drill bits are just round twisted knives...Ed
Click to expand...
yeah what Ed said.
it won't fly, it don't have wings:p
instead of saying it won't fly,,, I was going to say
stand up and be a man and grind them by hand :D

I'm just yanking your chain
I know that some guys can't do it by hand, if not grinding all that often or havn't learned to do so
but in my opinoin if you can grind a blade and get both sides right then why not learn to grind your bits by hand? both are simply cuting tools..
and it takes no time at all..

if you can make a knife and do it close to being right anyone should be able to make most all thier tools and sharpin them and make your own jigs too if you have to have them...:) start with the bigger bits and work you way down.
once you learn , you can do some interesting things with them.
control your cuts make a bigger hole with the same bit, you can keep them from biting so hard or cut like a mad man and yanking crap out of your hands.

Bob Loveless said once in one of his videos that there isn't a man alive that can hold a piece of steel by hand while drilling with a 5/16" drill bit , sure you can,, if it's sharpened right and you have a feel for the piece you're drilling,it's a piece of cake.though I'd recommend you know what your doing with the angles first before you try it. and be very confident in yourself
 
Anything 1/8" or smaller I've always had a hard time seeing to sharpen by hand. I always thought bench grinders were drill doctors.
 
Ive got an old craftsman drill bit grinding jig much like the grizzly. Its a little bit of a pain to get set up but works great after you do.
 
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