A simple extruder housing (No supports needed)

BOM

1x M4 x 10mm

3x M3 x 10mm

1x M3 x 16mm 

1x (optional) M2 x 6

1x Ender 3 extruder gear

1x Ender 3 extruder idler bearing

Update: 6/12/24

New mount style for the mountable one so now it fits a 2020 profile, has a space for a M5 Bowden fitting, and other small changes.

 Extruder mount adapter for old mountable version on to 2020 profile.

Inspired by Kossel Mini NEMA17 Extruder for 1.75mm Filament by blomker - Thingiverse