I designed this for the PG35 stepper motor. I bought a micro extruder kit from Ultibots, but I bought the long fin heatsink in the hopes it would cool the motor better. It does, but the fan shroud Ultibots provides only supports the short fin heatsink.

So this is intended for use for BOTH. This is fully parametric.

You can adjust:

1) Fan size
2) Fin height
3) Part thickness
4) Size of the transition from fan to motor
5) Size of the shroud around the motor

1) Use OpenSCAD to customize. Adjust the parameters at the top of the file.

2) Print fan side down with support.