how to hold carbide endmill in horizontal mill

Buy extended endmill holders and grind a flat on the shank of the endmills. Thats da only way. Shrug. YMMV of course

Gunner

"Considering the events of recent years, the world has a long way to go to regain its credibility and reputation with the US." unknown

I suppose that means I need to buy a diamond grinding wheel to grind a flat on carbide endmill? Why don't they come with flats?

cs

Greetings Chuck, You can grind a flat on the endmill shank. Also, depending on the load on the cutter you can just tighten the set screw on the shank. I do this in my big mill with the #50 holders. Most of the time I'm not hogging and so have no trouble with carbide endmills pulling out. ERS

A silicon (green) wheel will grind carbide. They usually don't have flats because there are better ways of holding endmills than with a setscrew. At the high end, they use heat shrink tool holders.

Charles Use a green wheel for the grinding of the flat. It won't look as good as when done with a diamond wheel, the the end result will be the same.(at maybe 10% of the cost. dutchman

What Eric said. Unless you're really putting a load on them, a perfectly round end mill shank will be held adequately in a collet.

Why not put a piece of lead shot under the setscrew. It will spread out and grip the carbide nicely, while the setscrew will not grip the raw carbide nicely, because neither the setscrew nor the carbide end mill will deform readily.

Good Luck, DoN.

A green wheel works just fine. Why dont they come with flats? Some do. But most are intended for use in collets, which dont use the flats.

Gunner

"Considering the events of recent years, the world has a long way to go to regain its credibility and reputation with the US." unknown

I suspect this will work. I also suspect it will necessary to push the endmill out from the back. :) Would 50/50 plumbing solder work ok?

It probably would -- if you can still get it.

As for the removal problem, I would suggest driving a wood screw into the lead to extract it.

Enjoy, DoN.