EMG-12 Endmill Re-sharpening module

There were various comments made on this thread about the limitations of EMG-12 with reference to the end mill size range this module was able to handle: 3mm to 12mm.

The factory which makes the above, also makes the size which covers a range from 4mm to 20mm. However, just like the EMG-12 pre JS intervention, this model needed a little modification. After JS's input, ARC has now added this modified version to the range too, offering EMG-20, in addition to the EMG-12.

General detail on this page.

JS will be doing demonstrations at the Doncaster Show.

Ketan at ARC.

Ketan, any details of the drill sharpener JS says he will also be playing with demonstrating?

Hi Jason,

JS is still playing with it. There are a few issues with it which need ironing out before we go anywhere with it.

Ketan at ARC.

Jason,

As regards the drill grinder we are now on the MK3 as regards modifications but this is only on the drill grinder module.

There are two modules to it, the drill grinder and the point thinning. The grinder is now working very well and I'm pleased with it but the point thinning leaves a lot be be desired, depending on diameter the results are variable and it needs more work on this part. The book that comes with it is useless and I'm certain it doesn't even apply to the machine I have but this will get re-written in the UK.

The drill grinder is quite unique in that normally you can grind drills two common ways, a swept point as I call it which is what most commercial drills are ground because of speed, and 4 facet grinding which is better but slower and takes more skill in setting up.

This new grinder does the first part as a 4 facet and then sweeps the clearance angle back all in one fast operation.

The change over point is very, very subtle and it hardly noticeable, it shows up as more of a shadow on the drill as opposed to a step. So far we are very pleased which what we are seeing and the support from the factory on this has so far been impressive.

I'll have the prototype drill grinder at Doncaster and will be grinding drills from 3mm up to 20mm, parallel or taper shank but not point thinning at this point.

John,

Is the drill grinder based on the Christen concept?

Steve

No, in some ways it operates similarly to the EMG series of grinders in that all the skill needed is built into the machine and didn't rely on the skill of the operator.

I have a similar machine to a Christian a German Meteor and whilst being a very good machine, ease of use isn't at the top of it's list.

Where this range of sharpeners score is that they are very fast which allows you to sign lick a cutter or drill up prior to use or to put them away sharp

Just to bump this up to the top and let people know in this thread that i will be running these machines at Doncaster this coming weekend grinding cutters for anyone who brings any.

Range of end mills or slot drills is 4mm to 20mm in 2,3 or 4 flute, HSS or carbide.

Same applies to drills on size 4mm up to 20mm in HSS or carbide , parallel shank or taper shank.

Please keep the selection to a maximum of 8 to allow everyone to get a chance. No charges for this servive but the organisers who are supplying the stand will have a charity box on the stand.