End mill grinding fixture

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75Plus:
It appears that your mill is an X-2. This addition will allow you to grind the tooling at a much higher speed.

http://littlemachineshop.com/products/product_view.php?view=classic&ProductID=2892

Joe

stovebolt:
A few years ago I bought one of those fixtures from Enco along with the 5C collets, unfortunately the indexing system is crude but I have sharpened a lot of end mills with it. I too started out using those cut off wheels, then I went to a standard cup wheel, now I use a diamond cup wheel. I hope I don't start anything here but my understanding is diamond wheels should be used a low speeds, I run mine at about 500 rpm.

CDCO has these diamond cup wheels for $43.00, usual disclaimer/ no connection just a satisfied customer.

The web site won't let me post a direct link, but if you enter "diamond" in the search box it'll take you to the right page, near the bottom.

http://www.cdcotools.com/

ScroungerLee:

--- Quote from: grinder on September 14, 2010, 12:16:25 PM ---
--- Quote from: winklmj on September 13, 2010, 01:15:55 PM ---I've come across a couple of places showing the small diamond disks (Harbor Freight variety) being used. They back them up with an metal backing plate to eliminate the flex.

--- End quote ---
Hi wink,

I tried that, but all it did was stiffen the wheel up to the edge of the washer. The very edge of the wheel that projected past the washer did most of the cutting but still was too flexible. Insted of breaking in half, the wheel broke around the periphery. Bogs suggested that the wheel should rotate so that the periphery of the wheel did the cutting. I thought about this at the time, but had no way to turn the grinding wheel through 90 deg. I think I have to find a way to mount my Dremel tool horizontally :nrocks:

--- End quote ---

The diamond wheels are made of metal with diamond coating. Are you sure you are thinking of the right thing?

Lee

Bogstandard:
Grinder,

All you really need is a standard cupped wheel on your spindle, and the quill speed as fast as you can get it. For dressing the wheel, just clamp your diamond in the vice and dress in the Y axis.

Use the method I said, feed in the Y axis only, and you should end up with good enough ground cutters.

For sharpening tungsten cutters, use a green grit cup wheel.

Bogs

ScroungerLee:
Hey Grinder, it looks like you will get this working nicely. What angles did you use when you made your fixture?

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