EMG-12 Endmill Re-sharpening module

[JasonBModerator @jasonb]

I see ARC as advertising this little thing that would not look out of place on a moon landing.

Anybody tried one or got any more info on it? I assume it just does the ends of the cutter.

J

 

PS looks like the slow boat from China has also arrived with the new range of milling cutters

Edited By JasonB on 10/04/2015 13:28:36

[JasonBModerator @jasonb]

[wheeltapperParticipant @wheeltapper]

At 850 quid I doubt if anyone will try it, it's probably cheaper to buy new cutters.

Roy.

[Gray62Participant @gray62]

Why spend all that just to sharpen end mills when you can buy Quorn castings for less than half, have the joy of several weeks build, and be able to sharpen all manner of things on it

Wonder when they are going to sell the Saturn 5 lookalike drill grinder to go with it

[Ian PParticipant @ianp]

Jason

You ask if any one has more info on 'this little thing'

What, where, and how do we know what it is? can your elaborate please.

Ian

[JasonBModerator @jasonb]

You will have to read the advert in the latest ME, just like I did (4506)

Can't see it on Arc's site and not a lot on the net

[KWILParticipant @kwil]

It does say on the "ad" that it is reviewed in MEW228 (top right corner)

[Nick_GParticipant @nick_g]

Posted by JasonB on 10/04/2015 15:14:55:

 

Can't see it on Arc's site and not a lot on the net

 

 

It's in the 'Machines' section. http://www.arceurotrade.co.uk/Catalogue/Machines-Accessories

 

Nick

Edited By Nick_G on 10/04/2015 16:13:48

[Neil WyattModerator @neilwyatt]

We have an exclusive review on the EMG-12 'Module' in MEW 228, just cleared for lift-off (sorry, printing).

I've seen it in action on some of my own blunt cutters and it's (a) very fast and (b) really does restore the end to as-new condition. £30 quids worth sharp again in about 5 minutes.

Won't say any more as all will be revealed in MEW228!

Neil

[RobboParticipant @robbo]

When I first saw this I thought that it was supposed to be printed on April 1st.

[Jesse Hancock 1Participant @jessehancock1]

Neil I don't think you have to Roy has said it all. Unless you're thinking of going into business. I could buy an extra milling machine for that money.

[blowlampParticipant @blowlamp]

Could be R2D2's love-child.

[Danny M2ZParticipant @dannym2z]

Like you said John, it's horses for courses.

As a club/shop purchase it could well justified.

For occasional use one would have to re-grind a lot of end mills to justify it's cost – but it is an interesting device.

As for my own efforts, I use a square block in conjunction with a Harold Hall designed simple grinding rest which gives satisfactory results for the end cutting edges. When I get a-round-tuit I plan to make the optional jig which permits sharpening the side cutting edges.

* Danny M *

[Neil LickfoldParticipant @neillickfold44316]

The only issue I see with the ARC sharpener, and maybe it does or does not , allow the resharpen of variable pitched cutters. They have been around a few years now, in 4 and 6 flute geometry.

Neil

[DMBParticipant @dmb]

Blimey Ketan, where did you import that from, Mars?

John.

[DMBParticipant @dmb]

Some years back I saw probably the simplest possible device @ Harrogate by a chap from a Leisc. club. It looked similar to one side of a clock makers wheel meshing device + held endmills + slotters horizontal to grind the flute edges. This could obviously cope with 2,3,4,6 or as many flutes as you like and any old pitch, constant or variable. The usual finger guide was incorporated thus driving the cutters revolving @ whatever its pitch is. Unbelievably simple but looked likely to be able to tackle the sides of any spiral finger cutter.

[JasonBModerator @jasonb]

Thanks for the insight John, probably hard for me to justify the cost with the amount of cutters I buy a year and FC-3 ones being relatively cheap.

What method does it use to hold the shanks? is it collets with enough adjustment to allow both metric and imperial shanks to be held or just the common metric sizes?

Also how much does it take off the end per setting. I know its the corner that tends to get lost first with the lighter cuts MEs tend to take but say you had been doing a lot of work with a 3mm depth of cut would you be able to get back to a reasonably sharp edge in one go or would you have to take a few bites at it to get to unused edge?

J

PS Ketan if you are following this are the HSS cutters also available or just carbide?

[VicParticipant @vic]

Strange looking machine! Looks well made though so maybe it's a fair price. Only negative I can see is the small cutter size range. Would be a nice addition to a club though.

[JasonBModerator @jasonb]

Thanks John, had not thought of taking the end of with a more rapid method, guess I'll just have to wait for the write up.

J

[CirclipParticipant @circlip]

Lot of cash just to sharpen the ENDS of cutters. I think HH's rendition is far more adaptable.

Regards Ian.

[Neil LickfoldParticipant @neillickfold44316]

John, they now sell cutters that are deliberately undersized. Like a 15.7mm for a 16mm slot. The idea is that it makes a pass through the middle, then cleans up each side.

We always measure the cutters for anything accurate, and do the final finish pass after measuring the part. We compensate on the cutter diameter info in the tool library.

Neil

[John Stevenson 1Participant @johnstevenson1]

Posted by Neil Lickfold on 11/04/2015 12:19:03:

John, they now sell cutters that are deliberately undersized. Like a 15.7mm for a 16mm slot. The idea is that it makes a pass through the middle, then cleans up each side.

We always measure the cutters for anything accurate, and do the final finish pass after measuring the part. We compensate on the cutter diameter info in the tool library.

Neil

.

Yes but when you sharpen the end it's still 15.7 so don't understand what you are trying to say ?

Unless you are running down the edges of plates all day on the side of a cutter the flutes don't wear, only the bit that's doing the cutting which in this game is hardly more than 3mm.

[JasonBModerator @jasonb]

Problem is the average model engineer does not have a tool libruary or even a CNC machine to store it in so would have to keep a check on each and every cutter and make manual calculations for each cut which gives rise to errors and just takes up valuable shed time.

J

[KWILParticipant @kwil]

I have a man in Nottingham who does all my larger cutters (ie all over 10mm, including some larger high value ones) I drop them off annually in a large box. Anything under 10mm goes in the bin. It would take many years of regrinds to pay for this bit of kit, but one could always be tempted on a convenience basis

[Neil WyattModerator @neilwyatt]

> (16mm, 6 flute, solid carbide)

Hate to tell you this, Bogs, but its does do carbide, if not 6-mlute. You can get diamond and CBN wheels.

Neil

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