Drill doctor

I have a drill doctor 750. It does two things for me:

1) converts dull, chipped, ruined drill bits into functioning drill bits

2) grinds tungsten electrodes

It does both things adequately.

i

I have a 750 in my shop that I got new at a convention for $100. I have never plugged it in.

I DO have about 200 drill bits, a couple of them that are sharp. I need to get it out and try it one of these days.

Steve

They are very functional, and if you do a lot of drilling, they're definately worth the money. I spent a couple of hours with mine, sharpening just about every drill bit I own, and the results were fantastic.

The lower-end models will only do up to 1/2" bits, and only 118° bits. Higher-end models will do up to 3/4" bits, and give you the ability to do both 118° and 135° bits.

If you only have 118° bits, up to 1/2", look at the 300 or 400 series. If you have a mix of 118° and 135° bits, look at the 500 series. If you want up to 3/4" capacity, with 118°/135° capability, look at the 700 series. A DD 750 professional kit can be had online for just over $100.

It's one of those tools that makes you wonder why you didn't get one years ago.

I have one - paid for it by saving several Silver-Deming drills. One was a 3/4 that was chipped such that grinding by hand would be a bear and risk. It took a while but saved the drill.

I then took the drill to the grindstone and finished the grinding. (relief areas). Preforming is just fine. Saving a drill is just fine. Martin Martin Eastburn @ home at Lions' Lair with our computer lionslair at consolidated dot net NRA LOH, NRA Life NRA Second Amendment Task Force Charter Founder

SteveB wrote:

I have never used one so I cannot write from that. However, I have about

200 twist drill bits (purchased retail for specific purposes and in bulk at auctions and yard sales) all the way up to 1".

I grind by hand/eye on my bench grinder and can get excellent results. It takes a little practice to learn to do this but it can be done. You don't have to be a machinist to have the skill and I reckon any weekender can get it down.

Here is a website that addresses the issue.

Here is the result of a google newsgroup search on terms "how sharpen twist drill hand". Read down the page a bit where Enginman1 responds to the question. It's quite good I think. Best, David Todtman

They work great.

B.H.

There seems to be contingent that maintains that the DD is a POS. After a short while of figuring out how best to use it, I find that mine does a nice job of keeping my drills in good shape. Well worth the money.

Peter

I was 100% frustrated until I watched their video.

i

I've always been pretty good at sharpening bits by "eye" but when you use them on a mill or lathe, they need to be perfect, and the difference in accuracy proves the machine to be a good purchase.

Ahh. Well this is relevant to me since I hanker greatly for a lathe. Thanks for the point.

I've managed to mangle every masonry bit I've tried to sharpen, but all my twist bits have razor edges on them (oh, and they're all split-point bits now... hardly have to center-punch anymore)