EMG-12 Endmill Re-sharpening module

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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.

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

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

> (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

But it only goes upto 12mm Neil unless Bogs is waring a lot off the sides

Id like to hire one of these machines for an hour. Someone gave me a small box of mills and quite a few have been badly "sharpened" on the end...

I assumed he meant cutters that were 6 flute, OR big OR carbide, not all three at the same time!

Neil

I'm sure there is no one on here who is doubting Neils enthusiasm for the machine or it's capabilities. I'm also fairly sure that a lot of us on here are of fairly meagre disposable income and it's this which is the stumbling block for most. Not ££££'s but ££'s and indeed the question do I need a dedicated sharpener for milling tools or shall I put the car on the road again this year?

Being realistic with none existent cash is not being negative in my book.

Meanwhile... Jeeves get the Bugatti out old bean I need a loaf of bread and some fag papers.

Being sarcastic however is a trait I inherited from my father so please forgive me if you can.

I really don't see the value in wasting valuable magazine space reviewing such as this. It is most likely out of the price range of most model engineers and has very limited capabilities. In my view it's right up there with those useless deckel clones that many traders try to fob us off with as T&C grinders. Money better spent on a Worden, Quorn Kennet, or similar. Alright you have to build them yourself - but as I said before(slightly tongue in cheek) there is a lot to be gained by this, the pleasure of achieving the final result, many good techniques learnt and far more versatile whichever one you choose.

I appreciate that none of these are as simple to set up but once the method is learnt it is not difficult to repeat, I use my Worden for the end of all my end mills, drills and lathe tools, My Quorn even though not fully completed does a grand job on honing the flutes on milling cutters.

I like many on here I'm time rich, but cash poor...

I'm sure the EMG-12 is a capable machine but it's well out of reach of the average ME's pocket.

I've just completed a version of Harold Hall's grinding jig/table and have made a half decent job of resharpening (as a challenging test piece) a well broken 1/4 inch 4 flute end-mill in less than 5 minutes . I expect that I could do the same with a 3 or 6 tooth cutter in a hex adapter, even carbide, with an appropriate diamond wheel and any size you like.

Plus, Harold's design can be adapted for a variety of tasks especially useful in a small workshop.

Well pleased; thank you Harold.

Phil

Edited By CotswoldsPhil on 11/04/2015 19:34:53

> I'm sure the EMG-12 is a capable machine but it's well out of reach of the average ME's pocket.

> It is most likely out of the price range of most model engineers

It's a fraction of the price of a new Myford or a CNC mill - should I exclude such machines from teh pages of MEW?

Neil

You should put it in.

7-1/4" gauge locomotives may be out of the range of some "locomotive types" because of costs of materiel and possible re-arrangement of home premises and cars and towing trailers and... (don't laugh - I figure going to the usual 7-1/4" stuff "over here" would require a few years more of work to cover the costs... a 7-1/4 "Tich" style or equivalent would be ok, but not the usual large stuff)

That doesn't mean that Diane should not publish anything larger than 3-1/2" gauge.

I found this fella in a used tool shop when I was on a break in the peak district. He wanted £700 for it claiming they cost well over £2k new. I was tempted but left it in the shop knowing they go for much less on ebay. Makes the Arc Euro one a bargain though....IF it does the same job....

Damn right you should, who in their right mind would pay 9k for a new 'Myford' big bore ( and it's in inverted commas for a reason - go figure as they say), overpriced and over rated. As for a CNC mill, at least you are getting something with wide ranging capabilities. Neither a lathe nor mill be it manual or CNC is a realistic comparison.

Iif that's the way things are going to go, then you just lost another subscriber.

As for the parallel drawn with a 7 1/4 gauge loco or for that matter a large scale TE, they are costs that can (and usually are) spread over many years, spending the best part of £1k on a machine to do one task is incomprehensible.

It's not often I get wound up by things these days, life is to short -but this, it's just too ridiculous - or is it ??

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It's just another product. whether it suits you or not is up to you. Personally I see adverts for mobile phones costing more than I care to pay, I wouldn't buy a new Myford as to me I can buy bigger, better at less cost but seeing the advert doesn't wind me up.

Jaguar, BMW and Mercedes all seem to make a good living but I wouldn't buy one.

By your own admission you have a Quorn and a Worden so why would you even want another T&C grinder? This machine isn't aimed at you, as you say life's too short, move on, nothing to see here.

Edited By John Stevenson on 11/04/2015 23:30:08

Where ever possible, we use the max flute length for cutting. As a general rule use only 10% of the cutter diameter as a cut width. If you have less power then the side cut amount will be less. This is side cutting, not trying to make the initial slot. The cutters get reground on bottom face and side faces if they are worn/not sharp. Where possible I like to put a small radius on the corner of the cutters, they chip less and therefore last longer.

It is also called adaptive machining these days in industry.

Neil

Edited By Neil Lickfold on 12/04/2015 01:50:42

> I'm sure the EMG-12 is a capable machine but it's well out of reach of the average ME's pocket.

I seem to have thrown a spanner in the works, perhaps I should have said my pocket.

I certainly would not pay £9k for a new, or even £2k for a used basic Myford S7, even if I could afford it. Current asking prices are silly. I suspect many Myfords and accessories are being bought up and then stored in the hope of increasing in value - what a waste.

If I was starting again I would probably go for a used Boxford. It's the size/weight issue which seems to be overlooked when passions run high about Myfords.

Back on topic >>>>> Should such adverts for expensive kit be excluded? I don't think so. The illustration of clever/novel engineering can sometimes be incorporated into your own projects.

Phil

Edited By CotswoldsPhil on 12/04/2015 07:59:22

The advert is not what what I was raising objection to, if you read my post I was referring to the planned review in the magazine. I agree there are a lot of products out there that are out of reach of the average ME.

Yes I have a Quorn and a Worden, but why do you assume this product is not aimed at me? that is a very presumtious statement. If this device was the answer to all my grinding woes then it may just persuade me to abandon the other devices in its favour.

'Move on nothing to see hear'!! - Don't tell me to move on, that is an offensive attitude and one I do not expect from a moderator.

I am all in favour of a review of this machine, although I have no intention of buying one. I like to see new ideas and may well pick up some technical details from how the grinder works. If this grinder uses some novel ideas, some bright spark will make their own copy at much less cost and then Neil can print the plans in MEW for us all to benefit from (provided no patents are infringed )

Doug

Problem is John that it's difficult to see how one could mount 1/4, 1/2 or 3/4" (6,12, 20mm) square lumps of HSS steel into it and grind various other angles on. Don't forget, I still use Carbon steel tooling as I don't find the necessity to rive lumps off quickly. After using a Christensen for sharpening 1/16" dia. and downwards drills in my apprentice days it made hand grinding futile, but it was a production machine shop so tooling costs didn't matter. They did however baulk at the thought when shown the "New" FC3 Chuck away milling cutters advocated for the equally "New" CNC milling machines.

Regards Ian.