[onmobiletemp]

They print titanium and ceramics ive heard. Must be expensive. I would be very interested in seeung someone print a ceramic motor, beefed up to account for poor strength of ceramics. Yes most hub motors are closed but its very common for people to drill holes in the walls of the motor to get some air cooling. Less common is actually filling the closed hub motor with oil -- ive seen blog posts where people report that if you get that to work it does wonders for cooling. But there are huge problems with it, mainly related to accounting for the expansion of the oil as it heats up. Even less common is real liquid cooling where coolant is channelled down the axle and into the stator. Doing it with plastuc would mean having some metal inserts for heat conduction to the coils.