About this 3D model

Same as the previous idea but this time with a cheap and nasty VGA card fan. These great little fans cost less than a buck and work really well for small cooling jobs. I also used a couple on my printer head. The fan housing is a press fit on the end of the stepper motor and the housing has a step inside to set a 5mm gap at the rear of the motor. The air enters through the fan and exit via the four side vents.