This should be an issue with previous motors and not sintered magnets!!
I broke 2 magnets , because the same reason as Reto told you , but it was 5 star or 5,5T with no sintered magnets!! And it was also prototype motor.
After that they sent us sintered magnets and everything was perfect!!
This is due to the fact that sintered magnets gives more torque and Less RPM's.
Previous magnets were broking due to hi RPMs and not temp!! even if a magnet has 300 celcium degrees won't broke , but it can be broken cause of extremely RPMs even if it is cool enough
Last edited by Zacharopoulos; 04-13-2007 at 04:51 PM.