Hey all,

So im pretty sure this isn't a machine issue but hoping you guys might have some insight. I am trying to machine some 6061 aluminum into a part for my 3d printer. My first operation is an adaptive clearing with a 1/2" roughing end mill. The end mill is only taking a 2mm cut at very conservative feeds and speeds yet while cutting on the first pass the tool holder is being pulled from the spindle collet. Has anyone had this issue, if so what did you do to remedy?

And FYI the first time I noticed it the tool came out of the holder so I switched holders then it pulled the holder from the spindle collet. And yes I did check that the spindle collet was tight and secure

Attachment 292278

Attachment 292280

Thanks,
Whizbang