This is a spring-loaded (parametric) bowden-extruder with a 608(zz)-bearing as idler-roll and a push-lever to release the filament (much easyer to handle).
The provided .stl (ready for 1.75mm filament) uses:
- 1/8" (~9mm) pneufit for 4mm ptfe-bowdentubes
- mk8 drivegear
- 3x M3 10mm
- 1x M3 13mm
- 7.5x20mm spring
Simply download the .scad, change the variables in openSCAD to your needs, print and assemble the thing :)