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Clarkson Drill Point Grinding Attachment

thestelster

thestelster

Ultra Member
Premium Member
Well, if we didn't have enough drill point grinding....here's another one.

I received this today and cleaned it up. It's missing some parts that I can make. The base maybe a little more difficult since I don't know the exact shape and where the index mark is supposed to be. The first picture is what I have, the others indicate what I need.

Maybe @RobinHood has one. He has everything else!!
 

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RobinHood said:
Yes, I do have the complete drill grinding attachment (box, extra indexers & the manual).

@thestelster let me know how I can help you make the missing parts for your sharpener.
Click to expand...
Ok, you asked for it!!:eek:

-I need basic dimensions of the base. As well if I order a hunk of cast iron to make the base, how thick do I need it?

-how long is the handle?

-what diameter is the ball at the end of the handle?

-detailed dimensions of the indexing collar for drill bits. (I don't think I'll ever need to do taps, so don't need those....for now).

I'd greatly appreciate all you can do for me. No rush, whenever you have the opportunity.
 
Hi Peter, thank you. The indexing collar is the one part that needs to be fairly accurate so decent drawings will definitely help, the rest is seat-of-the-pants make it work stuff.

Though if we can get dimensions of all the different collars and make detailed drawings, that would be a great bonus. But that's up to @RobinHood

The cast iron I got was from McMaster. I like that I get a certificate of composition, and where it's been made. I get 1-2 day delivery on almost everything I've ordered. The last piece I ordered was for the solid tool post project. 8" diameter, 3 1/4" thick, 42lbs, grey cast iron. Purolator shipping was $28.00US. How can you beat that?
 
PM sent.

Just looked the picture of what you have: I do see at least one spring loaded pin behind the chuck flange.

The indexing ring is off something else.
 
RobinHood said:
PM sent.

Just looked the picture of what you have: I do see at least one spring loaded pin behind the chuck flange.

The indexing ring is off something else.
Click to expand...
Both pins and springs are there.

The indexing ring is just a 48t gear with a hub attached. Good idea, but poor execution. They even ground the indexing lever to better fit the tooth profile. So I'll have to fix that too.
 
thestelster said:
They even ground the indexing lever to better fit the tooth profile. So I'll have to fix that too.
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That’s too bad.

Once you fix the lever, you may have to change the V-notch geometry to fit things together.

thestelster said:
The indexing ring is just a 48t gear with a hub attached. Good idea, but poor execution.
Click to expand...
That could for sure have worked well. Too bad they bodged the job.
 
YotaBota said:
Why am I not surprised lol.:cool::)

This is one of the few times I'd like to still be in MooseJaw, I'd love to Meet Rudy and get a tour.

@Dusty - no offense to the Moose intended.
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@YotaBota NO offense taken, you would just love the Jaw now with all the pot holes, mountains of ice and snow, tire ruts and barely skimming by big trucks and city maintenance equipment. This time of year cabin fever really sets in. LOL

Who is Rudy, somehow you lost me with that???
 
I'm almost ready to start making the missing parts of the Clarkson Drill Bit sharpener.

- 9" OD x 1.31" thick gray cast iron
- 1 1/4" phenolic ball
- 17-4 PH stainless 5/16" for the handle
- 30° hss tapered endmill cutter

I still have to pick up some 3"OD 4140HT for the collars.

I also have to make a chuck key, and a star knob.
 

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I made the handle this morning.

I didn't like that the ball knob had a boss where the threads are, nor the seam along its circumference. I chucked a long 5/16"-18 bolt, attached the ball knob, removed the boss with a parting tool, then filed sanded and polished the ball.

The handle is just 5/16" 17-4PH stainless which I single point threaded on the lathe, and then polished it up to look respectable. Hephaestus, god of fire, metal, and craftsmanship, insists that everything we make must look respectable!! :cool:
 

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