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Dual hobbed bolt extruder: no-grinding attempt

Dual hobbed bolt extruder: no-grinding attempt

thingiverse

This is my attempt to make a better extruder for my big printer. I have a bowden extruder and somethimes the filament has difficult to be extruded. It uses 2 hobbed bolt to drive the filament. I have finish to prints all the parts but havent try it yet. Still a WIP concept. haven't upload the body stl file because it has some errors, that I have fixed removing some parts with a cutter... update 2014-10-20 upload two version of the main body

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