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Originally Posted by KenWittlief
At this point in the design cycle I would recommend looking at your drivetrain design, to keep the motor RPMs high, so you dont need a fan
it should be easier to design in one more set of gears in your drivetrain, to get the motor RPMs up, than to design for bad design and fabricate monster heat sinks and fans.
You can run those drill motors all day long, at their intended speed and load, and they will not get hot.
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Of course you should try to design things so they don't get hot, but this was using the kit gearboxes to the kit 12" wheels, and the motors certainly did get hot, as did the blocks surrounding them and to a lesser extent the parts of the frame they were attached to.
On a FIRST robot, you're likely to be using parts outside of their intended specifications even if you think it should be totally safe.