Compact Extruder for 3mm filament

thingiverse

Print just the parts. Use two M3x10 screws to attach to the motor, on the left side. Use an M3x16 screw for the idler-to-extruder body. The bearing is a standard 608 skate bearing, which attaches with an M4x10 screw (Note: this is different from the original M5). If you have an M4x12, which is more common in my case, use a spacer. For idler tension, you can use a M3 screw longer than 12mm. It's a good idea to add a spring, as you will be able to change the filament easily using a notch. Use a push-fitting for 6mm OD PTFE tube (4mm ID). I have a Chinese E3D version all-metal extruder and the PTFE tube came with it. Note that the screws holding the Bowden compact extruder to the frame are M4, not the original M3. When printing with 3mm filament, it's a good idea to keep it steady to the frame. : ) Enjoy! Update #2: Finally, I made everything fit with the 1/8'' brass push-fitting for 6 OD PTFE tube. Everything looks nice - but there is an important note that in 1/8'' version, you'll need a 24T gear drive wheel, like this one: http://www.ebay.com/itm/26T-Tooth-5mm-Bore-Brass-Filament-Drive-Gear-For-DIY-3D-Printer-Extruder-/141353563206?hash=item20e9543446:g:sjoAAOSwEK9TzNeZ. I haven't tested it with a hot-end yet - I mounted a motor with less torque, if it's working with that, it will work with every motor with more torque. : ) Still waiting for the hot-end to arrive (I hope it will be this week). Print Settings Rafts: No Supports: No Resolution: 0.2mm Infill: 50% Notes: I printed it with a 0.2mm layer height and 50% infill.