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i thought of simple Nema 23 cooling assemby made by two 3d printed parts.

the first part is the main body which is mounted with four M3x12 bolts (and nuts) directly in the stepper motor.

The second part "bolt base" are the 'bumpers' attached to between the steppermotor and the M3 bolts

Finally the are four slots in the back where you can mount a 60mm fan

Ready for printing ,no support needed for the print

Step 1: 3dprint

First of all you got to 3d print the .stl files attached to this instructable

Step 2:

Then you need 4 Hex bolts M3x12 and four M3nuts to bolt in the Φ4 holes

Step 3:

Slide the motor around 20-30mm into the base

you can also use a block (of whtaever )30-40mm thickness as a distancer in the back side of the motor to make easier your life.

center it and you re ready for the next step

Step 4:

Now use your extraordinary skills to put the "bumpers" , just slide them nicely in the gap between the bolt and the motor

then start fastening the bolts one by one evenly in all sides

Step 5:

Now you can fasten your 50mm fan in the back side in the for slots and you re to go..

<p>This looks really well thought-out. Nicely done!</p>

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