I picked up a Demo Mini Mill at an auction for a very good price. I was very surprised to find the drive gears are made of plastic. The low range gear is totally striped, this is going to be replaced free of charge by the agent for the mill along with a few other sundries. I have totally stripped the head and replaced all the bearings with NTN units, set the backlash on the taper roller bearings and lightly greased. Running on the high range gear it runs extremely smoothly. The one thing that bothers me is how hot the motor runs, its 1000W and a variable speed unit. After Ĺ hour of running itís so hot I canít hold my hand on it, the heat dissipates down to the spindle where itís uncomfortable to hold whilst doing tool changes. When in neutral everything is free and easy to turn so Iíve ruled out sticky or tight bearings. Has anybody else experienced this problem on their mini mills or is this just normal running?