what are the wear items besides the end mills and what is the maintenance schedule?

You will need to make adjustments for the v-groove bearing every-now-and -then. Also, you will see wear on the Aluminum rails, however, you want this wear to occur because it is cold-rolling the rails for strength. So, overtime you want to evenly distribute the wear on the rails. So, you will need to make sure that you make adjustments to your cuts on the table. For a week you might want to cut in the upper right quadrant of the table, then cut cattycorner. Also, overtime you will need to make adjustments to the roller chain because it will stretch. You may not see the difference, but if you are trying to achieve a 1000th of a inch this could through you off. Finally, depending on how much use you are getting out of your machine you will need to square it up. For example we use our machine from 9-5 every week day, and square it up once a week.