I'm throwing around different plans on my own power drawbar but before I get too far into it I'm curious if anybody has measured how much force it takes via drawbar on to the collet of an R8 taper for it to have a substantial enough clamping force so I wouldn't have to worry about the tool ever slipping.
Would 1000lb of upward force on the collet be enough? 1500lb? Just curious because that will determine where I go from here with my tinkerings.
Ideally I would like to use the Tormach tool holder system with my own power drawbar so I would always keep Tormach's collet in the spindle and just hit a button to drop it down and again to pull it up to it's exact location.
Help would be greatly appreciated and would save me quite a headache in figuring out how much upward force on the collet is required to provide enough clamping pressure on the tool.
Thanks!