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Tool Talk Discussion Forum

Drill bit sharpener mounted to a bench grinder

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chuckinnc

12-26-2007 08:13:05




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Ok I finally found one of the General brand drill bit sharpeners that mount next to a bench
grinder. I was at a local flea market and without
instructions so here is a few questions for people that succesfully have used this type. Does the holder mount facing or to the side of the wheel? If on the side then does it make any difference where, would up (12 oclock) or either side better? What grit size would be better, my grinder has course on one side and fine on the other?

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super99

12-27-2007 06:06:14




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 Re: Drill bit sharpener mounted to a bench grinder in reply to chuckinnc, 12-26-2007 08:13:05  
Had one from Craftsman years ago, used the side of the wheel about 9 o clock. worked great for all but very small drills. Use a bunch of junk bits to practice on to get the hang of it. Brother got me a Drill Doctor for Christmas one year so I could sharpen his bits for him. I tried it, could never get the relief right. I sharpen most all bits by hand now, usually get angle too severe, but they work. I was helping a bin crew, and the bits were so dull they could hardly drill a hole, so I had a guy hold the 4" hand grinder on its side and I sharpened a few for them and they thought I was a god. Getting harder to do with stinkin bi-focals. Just had a fine stone on the grinder, didn't buy a special one. Chris

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Amarillo Doug

12-26-2007 19:09:38




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 Re: Drill bit sharpener mounted to a bench grinder in reply to chuckinnc, 12-26-2007 08:13:05  
I bought one of the professional model drill doctor drill sharpeners and it was the best investment I ever made.It paid for itself the 1st time I used it to sharpen a set of MATCO 135 degree cobalt bits.Easy to use too.



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Dave Sherburne NY

12-26-2007 15:32:03




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 Re: Drill bit sharpener mounted to a bench grinder in reply to chuckinnc, 12-26-2007 08:13:05  
You can get a special grinding wheel from Sears so
you can grind on the side, a lot easier. Also, I have a drill doctor, and for bits smaller than 3/16"
I find its easier to go by new ones.



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dobber

12-26-2007 14:25:13




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 Re: Drill bit sharpener mounted to a bench grinder in reply to chuckinnc, 12-26-2007 08:13:05  
Have one of those too and always used the side of wheel but it's a wide face special wheel with finer grit made for drill sharpening and don't remember now where we got it. We fixed up a arbor buffing shaft with another motor on a stand the drill sharpener stays on all the time and keep a wire buff wheel on other side of it to get more use of out it.



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Jon Hagen

12-26-2007 13:55:09




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 Re: Drill bit sharpener mounted to a bench grinder in reply to chuckinnc, 12-26-2007 08:13:05  
Chuckinnc, check your E mail. I will send a copy of my General operators manual for you to print off your own copy.



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Rod (NH)

12-26-2007 13:51:15




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 Re: Drill bit sharpener mounted to a bench grinder in reply to chuckinnc, 12-26-2007 08:13:05  
General 825 Sharpener



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guido

12-26-2007 10:29:56




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 Re: Drill bit sharpener mounted to a bench grinder in reply to chuckinnc, 12-26-2007 08:13:05  
Hey Chuckinnc
Drill sharpenig is done in front of the wheel, and the stone should be a fine one. The angle is set by the drill sharpening tool. If I had a picture of the unit I may be of more help.
I am like the other fellow that posted saying he does it by hand, like he said the small one are a little hard, if not impossible to do.
Guido.



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chuckinnc

12-26-2007 10:55:55




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 Re: Drill bit sharpener mounted to a bench grinder in reply to guido, 12-26-2007 10:29:56  
Thanks, I guess I will try both front and side to see which works best for me. But it sounds like i going to need a drill doctor for small bits anyway, or just buy a some spare small bits.



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guido

12-26-2007 13:37:19




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 Re: Drill bit sharpener mounted to a bench grinder in reply to chuckinnc, 12-26-2007 10:55:55  
Hey Chuckinnc
I suggest you do not use the side of the wheel.
It is not safe and with the motion that it takes to sharpen drill bits you will have different speeds to the face of the drill you are trying to sharpen. Uniformity on the cutting edge is very important for a proper cut . Make sure you have the angle set as well, both are the key to a good job.
Guido.



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36 coupe

12-26-2007 14:02:47




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 Re: Drill bit sharpener mounted to a bench grinder in reply to guido, 12-26-2007 13:37:19  
The General uses the side of the wheel.



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guido

12-27-2007 08:29:20




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 Re: Drill bit sharpener mounted to a bench grinder in reply to 36 coupe, 12-26-2007 14:02:47  
Hey 36 coup
I did not know how it attached to the wheel. I have seen the one I described on my post. thanks for the info.
Guido.



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Paul N Texas

12-26-2007 09:51:30




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 Re: Drill bit sharpener mounted to a bench grinder in reply to chuckinnc, 12-26-2007 08:13:05  
I'm not in my 70's or 80's, but dress or grind all of my bits by hand on a bench type grinder. I'm not a Tool and Diemaker either... Oh, but Dad and Granddad were :-) So is little brother. It takes a little time to learn to do it right, and for me is quicker than using a tool of some sort to setup. Some folks just can't get the hang of it, and are better to use the "Drill Doctor's", or the fixtures on the grinder.

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Dick Lemmon

12-26-2007 10:14:27




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 Re: Drill bit sharpener mounted to a bench grinder in reply to Paul N Texas, 12-26-2007 09:51:30  
Ya, I know Paul. My son and son inlaw both work for me and could show anyone that wanted to be shown as well as you would be able to. A lot of us old guys are more interested in passing along something learned long before all the fandangled inventions were out there that keep young guys from learning skills than younger guys are. That fixture will not teach anyone the different grinds for different materials and speeds. I like to see young people learn how to do things the old fashion way first and then use the new technology

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Areo

12-26-2007 10:38:45




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 Re: Drill bit sharpener mounted to a bench grinder in reply to Dick Lemmon, 12-26-2007 10:14:27  
Back in the 60's I started working in this machine shop that used alot of drill jigs. This one fixture had 1" and 1 1/4" reamed holes. Well the 63/64 drill and the two reamers were the same length, but the 1 15/64 drill was 1 1/2 inches longer. The accepted practice was to drill the smaller hole, crank the table on the drillpress down for the longer drill and then crank it back up for the reamers. I asked why don't we just cut off the longer drill to match?
The shop foreman got a terrified look on his face, started to tremble and asked who was going to resharpen the drill after cutting it off. I told him I would. I almost had to swear I would buy a new drill before he let me cut it off. He couldn't believe it when a little later I had the job done. It was in aluminum so the cut pattern was obvious on the drill to touch it up where it didn't cut exactly uniform. Saved alot of time and a sore arm from all the cranking.

Areo

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Dick Lemmon

12-26-2007 09:21:02




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 Re: Drill bit sharpener mounted to a bench grinder in reply to chuckinnc, 12-26-2007 08:13:05  
You do know if you find a tool and die maker in his 70's or 80's that started as an apprentice in his teens, spend a few houres in front of a post grinder with him, that you will never use the fixture. You might have to buy a cheap General drill bit gage to use for a while.



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jack12345

12-26-2007 08:45:30




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 Re: Drill bit sharpener mounted to a bench grinder in reply to chuckinnc, 12-26-2007 08:13:05  
I too have a General,works good, takes time to get the hang of using it.Each winter I go thru all my bits and get them ready. Fine grit set at 12 oclock seems good making 2-3 passes each side on same setting.Small bits are hard to do right.



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