Originally Posted by
or8ital
The motor coolers like the muchmore cooler/chiller and people using canned air upside down on motors prior to running them to have them start off cooler. We found to be the cause of motors failing. This was on an outdoor track. So our only guess was perhaps the difference in temperature was causing condensation in the motors and causing them to fry. Once everyone stopped doing that then no more fried motors. It was counterintuitive so it took a while to figure out.
Your best bet is just to gear correctly and monitor the temperature. Small fans placed behind the motor do wonders to keep it cool. I would just stay away from the motor chillers.
Interesting.. I have never seen a failure using one of these.. but I did mostly use it indoors. You are in Ohio though.. how hot was it outside when you guys saw these failures? Was this in brushless motors or brushed motors?