On Fri, 03 Feb 2006 23:56:06 -0600, Richard J Kinch
wrote:

Eric R Snow writes:

Like when taking a heavy cut with a long endmill. E.G. a 3/4 inch dia.
endmill, 3 inch flute length, high spiral, with 2.5 inches of flute
facing a titanium part. Or, 1/2 inch high spiral endmill hogging
aluminum. Both situations will tend to pull the cutter out. I don't
always reef on the drawbar, but it's been tightened pretty tight a lot
in the last 25 years.

I would consider a setscrew holder instead of a collet to hog.

It is pretty easy to overtorque a 7/16 bolt with a hand wrench, so my
intuition is that the drawbar shouldn't be gorilla'd.
Well, like I said, I bought this machine new in 1981, it's one of the
machines I use to make a living, and it's still on the original
drawbar. And it's in good shape.
ERS