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Old December 15th, 2014, 02:40 AM   #1
Mr. Beefy
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Default Drill bits? Or Drill Doctor?

Anyone every used the drill doctor? Is it worth the price?

http://www.amazon.com/Drill-Doctor-D.../dp/B000BKTA00

Or should I just keep buying new bits?

Looking for high speed steel bits for drilling tabs and such through 3/8's plate.
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Old December 15th, 2014, 02:50 AM   #2
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A friend of mine bought one of the drill doctors. From everything I've heard, if you understand how to use it, it's great. All I've ever done is create shorter drill bits. I haven't messed with it enough to get it set up right.
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Old December 15th, 2014, 04:58 AM   #3
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I sharpen my bits, by hand, on a bench grinder..
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Old December 15th, 2014, 04:59 AM   #4
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I have one & love it.Like said, you have too understand how to use it.Real nice for small drill bits or to put a split point on a larger bit.
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Old December 15th, 2014, 05:34 AM   #5
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Used one all the time when I was a machinist. Read the instructions on how to use, or you will destroy your drill bits and hate it.
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Old December 15th, 2014, 06:18 AM   #6
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I just buy new ones lol
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Old December 15th, 2014, 06:21 AM   #7
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Quote:
Originally Posted by GearDrive View Post
I sharpen my bits, by hand, on a bench grinder..
Me too. One of the first things I learned how to do as an entry level machinist.

Still a PITA on anything less than 3/16" or so.
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Old December 15th, 2014, 06:33 AM   #8
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I like a belt sander and a cut-off wheel. Keep water handy and don't let the bit get too hot. Keep dipping it in the water to keep it cool. If it gets too hot and you dunk it, it will probably chip when you use it. I like to split the tips on the cut-off wheel, probably just me, but I feel it starts better. I'm probably around 500+ drill sharpenings, but I still prefer to send out the big bastards (1.5"+) to get professionally sharpened for a few bucks when we send out our end mills to get sharpened. Hardest part is keeping both sides the same size, otherwise it cuts only on one side and you end up with oversized holes.

I've never used a drill doctor before....
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Old December 15th, 2014, 06:37 AM   #9
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I have one that came with a vcr tape. My son watched the tape and he said it is real easy after you see how it is done.
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Old December 15th, 2014, 07:14 AM   #10
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Don't hesitate, I've had mine for at almost 20 years.
Hand sharpening, no matter how good the machinist thinks he/she is, still can't compare for the consistiency and accuracy of a 'fixture sharpened' bit.
Get the big 3/4" one.
I sit down on a Saturday morning and within a few hours I have a few hundred bits all sharpened. Getting the 1/8" and below can be a real P.I.T.A. but everything else is spot on.

I also can't say enough about the company. About 10 years ago I was having problems locking the bits in the collet. I called the company and told them. They said, 'What color is your collet holder?' I told them and they said, 'oh, you have the older style, Let me send you the newer design, we had some problems with those'.................one week later I had two new collets FREE.

jim-kb8ymf

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Old December 15th, 2014, 07:19 AM   #11
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they are nice but you have to read the directions on how to use it. if you don't you will fark up some bits
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Old December 15th, 2014, 07:56 AM   #12
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Quote:
Originally Posted by kb8ymf View Post
Don't hesitate, I've had mine for at almost 20 years.
Hand sharpening, no matter how good the machinist thinks he/she is, still can't compare for the consistiency and accuracy of a 'fixture sharpened' bit.
Get the big 3/4" one.
I sit down on a Saturday morning and within a few hours I have a few hundred bits all sharpened. Getting the 1/8" and below can be a real P.I.T.A. but everything else is spot on.

I also can't say enough about the company. About 10 years ago I was having problems locking the bits in the collet. I called the company and told them. They said, 'What color is your collet holder?' I told them and they said, 'oh, you have the older style, Let me send you the newer design, we had some problems with those'.................one week later I had two new collets FREE.

jim-kb8ymf
I'm guessing you've never worked in an old school tool and die shop.
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Old December 15th, 2014, 08:09 AM   #13
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I'm guessing you've never worked in an old school tool and die shop.
x2

If you needed a hole to be accurate, you used a reamer.
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Old December 15th, 2014, 08:29 AM   #14
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Originally Posted by whiterhino View Post
I'm guessing you've never worked in an old school tool and die shop.
No, but I've used drill bits sharpened by those 'old timers'. They will be close but certainly not the same, land to land. And the relief angle is always different, which as you know, changes the 'bite' of the drill. As Lucas point out............a nice way to make a oversize or slotted hole!

I have nothing against knowing how to and 'in a pinch' use the old schol method, (but you WILL screw it up). With the tools available today it doesn't make any sense to not use some 'affordable' technology. Gone are the days a drill bit sharpener cost thousands of dollars and were only available to the shops who could afford such a luxury.
j

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Old December 15th, 2014, 08:33 AM   #15
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I have the larger doctor. Like above, once you figure it out, awesome.

I don't have to put off things cause I need to run to the store to buy a drill bit to finish, or sacrifice the quality of the project by settling on an oversize hole because the bit for the job was dull.
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Old December 15th, 2014, 08:45 AM   #16
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I have a Drill Dr also and it works well. I do also sharpen on the bench grinder or an angle grinder with a cut off wheel for the small ones.
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Old December 15th, 2014, 08:57 AM   #17
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I'm really liking the step/unibit drills for drilling by hand. They don't grab when breaking out the other side.
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Old December 15th, 2014, 09:56 AM   #18
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Quote:
Originally Posted by kb8ymf View Post
No, but I've used drill bits sharpened by those 'old timers'. They will be close but certainly not the same, land to land. And the relief angle is always different, which as you know, changes the 'bite' of the drill. As Lucas point out............a nice way to make a oversize or slotted hole!

I have nothing against knowing how to and 'in a pinch' use the old schol method, (but you WILL screw it up). With the tools available today it doesn't make any sense to not use some 'affordable' technology. Gone are the days a drill bit sharpener cost thousands of dollars and were only available to the shops who could afford such a luxury.
j
I won't argue that the Drill Doctor works awesome. However, I will argue that a good machinist can sharpen a drill so close that the end result will be hard to tell the difference. When considering the tolerances of a drilled hole versus bored or reamed, and that in most cases, you are working with .015-.030 clearance, a change of a few thousandths is a non issue. There are many other things that also impact a hole size. Speed, feed, pecking to clear chips and coolant will all impact a hole size.
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Old December 15th, 2014, 10:03 AM   #19
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Quote:
Originally Posted by whiterhino View Post
I won't argue that the Drill Doctor works awesome. However, I will argue that a good machinist can sharpen a drill so close that the end result will be hard to tell the difference. When considering the tolerances of a drilled hole versus bored or reamed, and that in most cases, you are working with .015-.030 clearance, a change of a few thousandths is a non issue. There are many other things that also impact a hole size. Speed, feed, pecking to clear chips and coolant will all impact a hole size.
You forgot the most important part of what effects a hole size... the size of the bit
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Old December 15th, 2014, 10:08 AM   #20
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I received a Drill Doctor for Christmas a few years back................
I tried it on a couple different occasions and hated it. It took too long to set up for me. (which is probably all on me)
I like my little jig (that I made) on the side of my Bench Grinder. I can sharpen most bits in under 30 seconds. Although I might not be as good as the DD for sharpening, I'm close enough not to waste time with that little plastic piece of crap.

I ended up selling mine to jhnyquest, and I think it broke on him before he even got to use it.

In fact I think I still owe him lunch over it............
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