Originally Posted By: Astro14
So, what oil, or lubricant, did those motors use? Given the average -63C temp, and lows below -100C, I'm going with synthetic...
Most electric motors that don't go into space are equipped with self lubricating, bronze bushings. And when the loads are very small, a composite bushing will work very well. I don't see how the electric motors in the rover would be any different or all the actuating components.