a fan would work better than a heatsink.
I re-purposed one of the stock SD4 fans for the X motor (the one that was on the back of the case). a simple printed fan mount that friction fits the bottom of the motor, attach the fan, and no more overheating X motor...
this is the fan mount I used: http://www.thingiverse.com/thing:128526
that mnight work and i was able to find a but ton of 30mm fans for about 2 pucks a piece
]]>I re-purposed one of the stock SD4 fans for the X motor (the one that was on the back of the case). a simple printed fan mount that friction fits the bottom of the motor, attach the fan, and no more overheating X motor...
this is the fan mount I used: http://www.thingiverse.com/thing:128526
]]>http://www.makrtoolbox.com/nema-17-size-heatsink.html
Just look at any place that sells 3d printer parts or Google NEMA 17 hear sink . these are about 40 x 40
]]>I say might, because I no longer have the original carriage, so my current setup interferes with the rods by about 1/4", but on the original carriage or other designs, it might not.
Because this is a more powerful motor, it doesn't need to work as hard, so it doesn't get as hot as the original. Therefore the heatsink and fan can be smaller. I bough a heatsink/fan intended for chipsets, with a total depth of about 5/8", and it works great.
Do search for that kysan model on ebay, there must be thousands of them. You could always pay $15 for one and get it in a couple of days from places like Printrbot, or Amazon.
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