actually I wanted to ad that I used it on a coil machine and the vibrations may have plated a roll in it, Ill use one on a rotary soon to know for sure. I've used ttech grips and hawk fixed grips on neotats before and had issue with them not running or running slow/heating up. Anyone else have those problems? Sorry don't meant to derail the thread, other than my cart popping out the grip worked great and I like the rubber that uses for the red part. The ttech did not pop out and worked smoothly.