A tool for sharpening milling bits.

[noel shelleyParticipant @noelshelley55608]

Depending on the depth of training in the workings of cutters, using a clarkson, or other type of T&C grinder to regrind might form a useful part of the course ? that said then there are several clarksons about, and for flute grinding the air bearing units as well. Noel.

[Clive FosterParticipant @clivefoster55965]

Jasons E-Bay fu and Google fu is better than mine.

Found a couple of similar but not the same offerings and several of the "shoe box" style more or less Darex clones but not one just like the Arc one.

Clive

[Chris Evans 6Participant @chrisevans6]

As an ex mould and die toolmaker cutter grinding/making is an art all on it's own. I made my living for years as a "Die Miller" Forming a cutter to produce the die was a daily event. I carried these skills over to electrode making when I started using EDM (spark erosion) machines for my living. CNC and 3D CAD programs killed the old skills but improved the quality and enhanced the speed of manufacture. Most things now are done with off the shelf carbide cutters available with various corner radius, programs are done to use these to give excellent results.

[duncan webster 1Participant @duncanwebster1]

In MEW a good while ago there was a design for a CNC end mill sharpening device. Would be a good project for the students?

[Steve GriffithsParticipant @stevegriffiths]

Hi Duncan – It would definitely be worth a look, although it would probably end up being made by a lecturer ! (We just don't have time with the kids to teach them more than the absolute basics).

 

I've just completed 3 Hemmingway knurlers (I had to redesign it in metric though haha) – I'm certainly looking for another project

Edited By Steve Griffiths on 26/03/2023 17:55:27

[John PParticipant @johnp77052]

The drawings for the machine that Duncan mentioned
can be found in at

https://groups.io/g/Quorn-Owners

including an improved text from that which was published
in MEW around 2008 .Shows how to grind tapered endmills
and methods to check the clearance angles.

It may be necessary to sign up and log in to see the
the photo albums.
The drawings and build notes and instructions for use are in
2 photo albums as jpeg files and can easily be downloaded.

It is as well to point out that the machine uses a Quorn
grinding head and was only made to regrind the side
fluted edges ,the ends are ground on the Quorn grinding machine.

The machine will grind flute edges from about 2mm to 19 mm dia
as seen here.

Some more photo's in my album Quorn and cnc cutter grinder.

John

[John HaineParticipant @johnhaine32865]

John, please could you post a link to the album in the Quorn UG site? I can't immediately find it (I am a member).

Thanks, John H.

[John PParticipant @johnp77052]

Hi John

Sorry don't know how to link this.

The Quorn site seems a little clunky to use ,but here go's

Log on , go to, Your groups then to Quorn owners,

along the left side listing click on Photo's

If the setting in the right hand box is [Sort by Created v ] (Arrow down )

You should see in the top row far right Cnc cutter grinder build photos
49 photos and below on the left Cnc cutter grinder drawings 47 photos.

I made an error in the last post the text for the build and operation
is in the list below the photo icon as files click on this
and scroll down to (cutter grinder build notes) it is about 25 files
down the list.

click on Cnc flute grinder .txt and it should download the file.

HTH

John

[Trevor Drabble 1Participant @trevordrabble1]

+1 for Abbco.

[John HaineParticipant @johnhaine32865]

John P, thanks for that, I've found the folders with your help. The photos are here

https://groups.io/g/Quorn-Owners/album?id=261640

and the drawings here.

https://groups.io/g/Quorn-Owners/album?id=261574

Build notes here:

https://groups.io/g/Quorn-Owners/files/cutter%20grinder%20%20%20build%20notes

[John HaineParticipant @johnhaine32865]

Steve Griffiths, I have sent you a PM.

[DMBParticipant @dmb]

I wouldn't pay hundreds of pounds for a grinding contraption.

I may soon make a copy of a simple flute grind jig that I saw on a club xbn stand. I think that it was a Leicester model Engineer showing his jig at one of the old Harrogate exbns. The endmill was held horizontally on its centres by a pair of round bars with points to fit the cutter centres. Round bars about 1/4" dia? shiny, so probably silver steel. They were held closely in two uprights and a steel handle fixed to the outer ends of the bars. A vertical 'tooth' guided the tool in a twisting motion as the handle moved the tool past the grinding wheel. Couldn't be any simpler but does rely upon accurate centres each end of the tool, which would be lost by rough gashing the working end. Too long ago now, unable to recall any system for advancing tool towards the wheel. Gadgets costing £600+ , that money would buy quite a few brand new sharp cutters. Or even more blunt ones and get them sharpened by a fellow club member who has made or purchased a gadget!

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