Originally Posted by
SCzEngrgGroup
There is NOTHING wrong with TTS. The problem is there are a LOT of poorly designed power drawbars out there, and the Tormach one is no exception. For TTS to work properly, the drawbar must be tensioned to something well over 3000#. Give it that, and up to a 1.5-2HP machine, and pull-out simply DOES NOT OCCUR. I've been using TTS for years, on several different machines, using my own power drawbars, which DO properly tension the drawbar to ~3500#. I have never once had pull-out, and I've had ZERO reports of pull-out from my PDB customers. And I do most of my roughing in 6061 at 3-4 cu. in./min MRR, and well over 100 IPM feedrate, with a 1/2" endmill.
Regards,
Ray L.