Re: aluminum heatsinks?

If you look at the internals of a motor, the ‘windings’ that carry the current are the part that gets hot.
These are spinning on the shaft, around the magnet which is in the center.
The only way for heat to be transferred out of one of these motors is for it to first warm up the shaft, then radiate the heat thru the magnet and into the external casing. (Or by radiating directly from the windings accross the air gap and into the external casing.) By the time all this happens a motor under extreme load or voltage will die anyway.
I dont think a different heatsink design will really benefit the cooling of a motor, but……
they look good, especially the black and the gold ones !
One way I can see to cool these motors is to pull them apart, drill a series of tiny holes in the casing and put them back together again. The spinning armature will push air thru the case and cool it. (Well thats the theory anyway)
These motors are reasonably difficult to stip and rebuild so if you are going to try it be very careful, and expect to destroy a few in the process.
:)uA