40mm Mendel90 electronics-fan mount
by Dekker3D, published
This is a 40 mm fan mount for the electronics on a Mendel90. But it should be usable wherever you need to screw a rotatable fan to wood.
Use an m3 screw to attach both parts together. The holes are 20 mm wide, so make the screw 25 mm or so. You will also need 3 m4 screws to attach the pole part to the frame.