Extruder 1.1

You will need these two parts first:

Take the upper one to mount it onto the DC motor with 4x M3x8 bolts:

Next, add the extruder gear

Add the next part and add 4 M5x30 bolts

Now, you will need to add 2 each of the 3mm extruder parts. They will only fit in one direction.

Get the small ~4.9mm shaft and insert it into the 625ZZ ball bearing and put it inside the groove. Also insert a 606ZZ bearing onto the motor shaft.

Add next layers as shown

Tighten the M5x30 bolts with M5 nuts. Don't use washers.

Insert a square nut to the square hole on the right side. Insert a M5x30 grub screw and screw it onto the square bolt. Repeat.