Bowden Direct Extruder for 1.75mm filament
thingiverse
This direct extruder is designed for Bowden and 1.75mm filament, featuring a NEMA 17 stepper motor. The concept is based on an existing extruder found at http://www.thingiverse.com/thing:275593. Key components include a 2mm ID, 4mm OD Bowden tube (e.g., http://reprapworld.com/?products_details&products_id=167&cPath=1616_1653), a Pneufit for the 4mm tube (e.g., http://reprapworld.com/?products_details&products_id=169&cPath=1616_1653), a drive gear (e.g., http://www.ebay.es/itm/151122877988?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1423.l2649), a 623ZZ bearing, a "strong" spring (approximately 20mm long; optional), and a NEMA 17 stepper motor. Additional components include M3 screws of varying lengths, one M3 nut, and a print of the main part, Shuttl3D_extruder_main.stl, which requires support material. The push part, Shuttl3D_extruder_push.stl, does not require support material. Follow assembly instructions using provided images and connect with Shuttl3D on http://www.shuttl3d.com, http://lab.shuttl3d.com, and http://store.shuttl3d.com for updates and information.
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