Drill bit sharpener - Woodworking Talk - Woodworkers Forum
 
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post #1 of 7 Old 08-07-2014, 09:43 AM Thread Starter
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Drill bit sharpener

Have an inventory of many drill bits - mostly standard sizes in a variety of diameters, some of them with broken ends, and a few rusted spade bits. After talking with a "sharpening guy" and his prices for each bit (@ about $2.00 each), looked on line & found "Drill Doctor" drill sharpening device at $130. Have you tried this device and is it REALLY worth the time & $ to get one? How do you economically sharpen both standard AND spade bits? As always your input is appreciated.
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post #2 of 7 Old 08-07-2014, 09:54 AM
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Never tried any sharpening device - I sharpen everything by hand. That's just the way I learned it years ago. That's about as economical as it gets.

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post #3 of 7 Old 08-07-2014, 10:08 AM
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I use this

I've had one of these for 30 years and I use it attached to my 6 x 48" vertical belt sander. It works on twist drills from 3/16" to 3/4"and even larger.

The belt sander is best because of the large surface area compared to a small wheel and you can easily change grits. I use a 100 grit belt.

http://www.amazon.com/Woodstock-D414...rill+sharpener

I do sharpen freehand when I'm in a rush, but that's an "acquired" skill and takes some practice.....

http://www.youtube.com/watch?v=y0SQkzScQk0

I use the method below which rotates the drill while grinding to get the proper relief angle behind the cutting edge.

http://www.youtube.com/watch?v=tthc3pXo62w

The answer to your question will only be as detailed and specific as the question is detailed and specific. Good questions also include a sketch or a photo that illustrates your issue. (:< D)

Last edited by woodnthings; 08-07-2014 at 10:27 AM.
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post #4 of 7 Old 08-07-2014, 12:58 PM
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I bought a drill doctor a few years ago, I had always sharpened my bits by hand but was finding it is now a bit more difficult to see what I am doing with the smaller sizes. It works okay, I use it when I have to, often with broken bits to get them back to where I still prefer to finish them by hand. I don't think I am ahead cost wise, many of the smaller bits I use are actually too small to sharpen on it, and can be purchased on Ebay for a very reasonable price 10 or so at a time so have become disposable items.

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post #5 of 7 Old 08-08-2014, 03:48 AM
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Quote:
Originally Posted by woodchux View Post
Have an inventory of many drill bits - mostly standard sizes in a variety of diameters, some of them with broken ends, and a few rusted spade bits. After talking with a "sharpening guy" and his prices for each bit (@ about $2.00 each), looked on line & found "Drill Doctor" drill sharpening device at $130. Have you tried this device and is it REALLY worth the time & $ to get one? How do you economically sharpen both standard AND spade bits? As always your input is appreciated.
woodchux
I purchased a Drill Doctor DD750X in 2013 for sharpening my expensive drill bits (it was on sale for $120). It has already paid for itself. I have some 18" long bits that I use for some deep holes. They are $30 and up for each one of the bits. It only took resharpening four (4) of these bits to pay for the Drill Doctor. I will occasionally hit a screw or other object that ruins the bit. Now with the Drill Doctor, the bit just gets a little shorter and a whole lot sharper.

I don't waste my time trying to sharpen inexpensive bits, I usually just go to the store and buy more.

I have never tried to sharpen spade bits, since I don't use them very often. The holes they produce are too sloppy for my work.

Auger bits, I sometimes sharpen by hand, but usually just replace them.

Forstner bits, I sharpen by hand or just replace them.

HSS bits, I just purchase new ones.

Expensive bits I use the Drill Doctor.

Your decision really comes down to these factors:

-> your drill bit cost
-> your sharpening skills (mine suck!)
-> how much your time costs, going to the store to purchase new bits
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post #6 of 7 Old 08-08-2014, 10:14 AM
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I have the Drill Doctor 500 series. I can and do sharpening by hand mostly due to speed. I have a large number of drill bits fractional, number, letter and metric. Sometimes I just spend some time on my dull bits with the DD. This is one of those machines that you will find that people have a love hate relationship. I really like mine. I am now due for a diamond wheel change.

Oh, anything above 1/2 inch I end out doing by hand. These are easy to see and out f the range of the DD.

Paul
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post #7 of 7 Old 08-11-2014, 08:40 AM
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I gave my Dad a 750 series, probably 25 or so years ago, and inherited it back when he passed. Still works well. May still be on the original diamond wheel and I know it has done a bunch of bits. Sometimes it isn't the cost of the bit as much as the availability. I live in a small town in the middle of mostly nothing so needing a drill bit almost any time on the weekend is a 70 or so mile round trip. Since I never seemed to be able to develop the skills to decently sharpen a bit (usually end up with several different bevels ) the thing has been well worth the investment to me.

John

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