NEMA 17 40mm fan mount

Attention:
Need good cooling when printing!
If you want to mount "fan mount" with a strong tightness, you can zoom out by 0.5% before slising.

Ver 1.0
Deleted. Many bugs.

Ver 2.0 (FULL REWORK Ver 1.0)
The walls = 1.5 mm.
Engine width = 42.3mm (possible backlash).
Deleted. You don't read the description, then complain. =)

Ver 2.1
The walls are thinner = 1mm.
Fan holes fixed.
Height = 30mm.
Engine width 42.0mm instead of 42.3mm.

Ver 3.0 (New! Faster and easier to print.)
The walls are little thinner = 0.9mm.
Height is less = 20mm.
Engine width 42.0mm instead of 42.3mm.
Some bugs fixed.

Ver 4.0 !!! SORRY BUG FOUND in prev. versions !!!
U can fix other models using source file and SolidWorks, Ver 4.0 is fixed. Or u can mount a fan like at "Makes" photos, thread to the motor!!! The distance between the mount and the motor must be > 4mm in older versions and > 2mm in the new.

Note: it's 40mm fan mount for cooling NEMA 17 step driver.