Cooling nema 17 motors (bracket)

cults3d

Tired of looking for a suitable support to adapt some 40x40mm fans to cool my steppers that lately were getting quite hot, I decided to make a simple but functional and discreet support that would meet the requirements. I designed these for the Ender 3, but they will probably fit most nema 17 motors, as they mount with an M3 screw. There are two types of bracket, one that fits the X,Y,Z motors and one with a 45º cutout at the tips for the extruder motor. You can see this in the pictures. For the X-axis motor, replace the M3 x 25 screw with an M3x 28 or 30 and correct with washers. For the Y-axis motor, replace the M3 x 6 bolt with an M3 x 8 or 10 and correct with washers. For the Z-axis motor, fit an M3 x 8 or 10 and correct with washers. For the extruder motor, replace the M3 x 8 with an M3 x 10 or 12 and correct with washers. To fasten the fans to the bracket use two M3 x 16 screws per bracket + 2 M3 nuts. The washers are basically to take advantage of some screws you have at home, because if they are too long they won't tighten the bracket. The best installation would be with an inclination of 45º with respect to the engine, so that it cools both sides of the engine. The temperature drop is noticeable. You no longer get burned when you touch them. For the fans I used 4 12 Vdc fans bought on Amazon.