I have a stepper motor (with dimension identical to Nema 17 stepper motor), and I want to mount a 4cm fan on it. However, when I tried to do that, I found that the screw holes of the stepper motor are 31mm apart
, while that of the 4cm fan are 32mm apart
. I'm really deeply shocked by the situation.
Is there any 4cm fan on the market with 31mm apart screw holes? By the way, who is responsible to the decisions of stepper motor dimensions and fan dimensions?
It is really really discouraging. )