Simple Nema 17 stepper cooler
thingiverse
A simple Nema 17 stepper motor cooling duct. This design is suitable for any axial 40mm fan. Using 0.08 A 24V fans resulted in a 18 deg drop in surface temp on the endplate of the stepper. (results may vary based on ambient temperature etc etc) Rev A is designed around the Stepper_Online 17HE19-2004S with a body length of 48mm. Rev B is designed around the Creality 42-40 Stepper Motor with a body length of 40mm Both revisions contain models with an without holes for M3 heat set inserts. Inserts make for a tougher part. Threading bolts directly into the plastic shouldn’t be a issue. More revisions(length) are available upon request.
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