[keithorr]

I cut graphite on an extended z axis router. It took a while to get everything dust "proof", removing all lubricant from ball screws to run them dry and sealing the motors.

I had to take two pac-sci motors apart at different times because dust had entered the motors through the end shaft. They were packed with graphite dust and had stopped running.

Didn't read any warning labels, took them completely apart, put them back together and they are still running two years later.