View Full Version : Home made DAREX DRILL SHARPENER

01-26-2008, 08:24 PM
One of my machining buddies scored a used Darex drill sharpener on E Bay a few weeks ago with some extra parts. So I bought them from him. The Drill setter 0- 1/2 inch collet and the sharpening attachment.
I borrowed the point splitter of the one at work 2 week ends ago . Brought it home measured and drew up a set of plans and set in to make all the parts for the point splitter attachment.
In the mean time my other Buddie Bill Pace got some Darex parts of E-Bay and some extra attachments for one two. So I set in to find some nice little grinders to use . Found some Ryobi at Home Depot for$ 39.00 et in to design a plate to mount all this on and make it look some what factory built. Got mine finished to day Bill should have his finished next week. It works great and looks good . Hope Yall like it I do and the Darex is hard to beat for keeping your drill sharp. I alsi have a Lisle and a home SDR sharpener. and have used all kinds over the years ,but the Darex isthe fasted to use and does a great job when set up right.



tyrone shewlaces
01-26-2008, 08:59 PM
I can't quite see the details.
Would you please post a full set of measured drawings for the parts you made so I can see what you did there on the point splitter?

01-26-2008, 09:35 PM
Very nice Lane, you always produce some very nice work. Some detailed pics and maybe the drawing would be icing... Nuther good project worth opening a sub group (Projects) for prosperity... JRouche

01-26-2008, 10:25 PM
Yes wish I knew how to post a drawing . Cant figure out how.

01-26-2008, 10:37 PM
very nice lane, like JR said ..... i guess the dial up guys are thrilled, but I'd love to see larger pics. take it all as a compliment, like your work so much i want to see it better.

Bill Pace
01-26-2008, 10:53 PM
Will try to get by Lanes in next day or so and maybe the 2 of us can get those plans up...I know I can do it from my puter, so hopefully I can get them in Lanes. He DOES have some quite nice drawings made up, --- I question how they will transfer to the site here and then out to a printer, the print is quite small, --- sure worth a try.

And, yes, that splitter is worthy of a larger pix of it...its..its.. well, its a thing of beauty, ---I'm surprised he didnt include the "DAREX" that is cast in the side of the original!!

I made some progress on mine today ... will be identical to Lanes. Spent a pleasurable afternoon yesterday looking over his shoulder assembling that thing, ----with it pouring down rain and cold outside, and us in a warm, well equipped shop, makin chips and shootin the breeze, couldnt get much better.....

J Tiers
01-26-2008, 11:40 PM
Yippur.... I've been contemplating that type project to replace my abysmal Drill Quack.

Plans, or even a good set of hints on the relief cam action would be very much appreciated.

01-27-2008, 12:49 AM
Lane, just scan it and it comes out as a jpg. This is just something that was handy, this covered my whole scanner and I reduced it to 35%x35%


01-27-2008, 06:59 PM
Hope this work`s
This is the drawings of the point splitter - some of the screw holes. The clamp band was purchased from Darex.

01-27-2008, 07:39 PM
That worked great Lane -- thanks!

Bill Pace
01-27-2008, 08:42 PM
Spent some time with Lane again this afternoon, -- he was doing some fine tuning on the Darex and when got through, he popped a couple 3/8" drill bits in to check it out and WHOA! -- will that thing do a job on a drill bit!....and the splitter.........!!

While the splitter was off I grabbed a couple shots so you can get a better appreciation of this thing, --- he gets stuff out of the scrap box and makes things like this!! Note the little white dot on the knob....yep, he made that too!

Thankfully between the 2 of us we got the print figured out....


01-27-2008, 09:18 PM
Looks good Lane, thanks for sharing.

tyrone shewlaces
01-28-2008, 10:33 AM
Wow. I was just kiddin' and they go & upload drawings & pics.
I'm in the same boat and have a Darex rig minus the point splitter, so although I was kidding I really will use it.


01-28-2008, 11:01 AM
Thats a sweet bit of work there! i'm always in awe of the amount of talent on here and you take the time to upload plans too! thankyou:D

01-28-2008, 01:14 PM
Thats a sweet bit of work there! i'm always in awe of the amount of talent on here and you take the time to upload plans too! thankyou:D Yabbut where's the .dxf?;) (Or at least an egg in my beer) :D

01-28-2008, 02:42 PM
Yabbut where's the .dxf?;) (Or at least an egg in my beer) :D

Now yer just getting greedy!:D and ive run out of eggs:p

01-28-2008, 08:01 PM
Yabbut where's the .dxf?;) (Or at least an egg in my beer) :D
What is a dxf ? I have heard the term but this computer stuff is Greek to me.All I know is how to machine ,and build things.

01-28-2008, 09:03 PM
A .dxf is just a drawing file format. Specifically, 'Drawing eXchange Format' created by AutoCAD.

01-28-2008, 10:43 PM
What is a dxf?What Joel said plus my feeble attempt at humor. :)

Even if I had the CAD file I couldn't come close to duplicating your work.

01-29-2008, 01:30 PM
Lane, I ran across this drawing during a web search this morning. Is this the machine your attachments came from?


Here's a link to the site with various Darex drawings.

01-29-2008, 07:59 PM
Correct . That is why i call it a home made Darex. That is a exploded view of the M5 model the m4 was the same with out the point splitter .(the attachment on the right.) The sharpening attachment on the left is what I bought fro a friend . The attachment was sold as a M3 to be put on your own grinder.

Bill Pace
01-29-2008, 09:48 PM
Heres what I ended up with....I scored with my ebay Darex stuff by getting the M-3 pieces like Lane, but got a bonus by also getting the splitter .... good thing too, I'd never built that thing like lane did!

The buddy Lanes talking about, scored the full M-5 package off ebay, along with some extra stuff that Lane was able to get from him. So, the 3 of us now have these HIGH dollar drill sharpeners and we didnt have to spent tooo much.


J Tiers
01-29-2008, 10:00 PM

If I have that right, the thing like a flat Rugby ball stuck on the holder is the cam for the relief.........

And it moves the holder around the pivot to form the relief?

That doesn't look so bad, it's a matter of messing with the geometry a bit to get the right relief, but ever after that it would be the same always..... So long as you get the drill alignment right (which is where the Drill Quack falls down)

Bill Pace
01-29-2008, 10:24 PM

the thing like a flat Rugby ball stuck on the holder is the cam for the relief.........

And it moves the holder around the pivot to form the relief?

"flat rugby ball" ---Hah!!, pretty good description, and you got it figured. ----That holder is to set the bit up in the chuck (rugby ball gizmo)--- get your tip angle, (135,118*, etc) and position the tip for contact to the wheel, -- when set, you move it undisturbed to the sharpener side (left) and then to the splitter, and yes, the cam determines the relief using about a 90* twist, -- with the splitter being just a rocking motion.

With a skilled operator it (like Lane) it takes 30-60 seconds to do a bit (if its not damaged).... we wont talk about how long it takes ME!