Prusa i3 Direct Drive Extruder
thingiverse
The direct drive extruder system is ideal for Prusa i3 printers, specifically when combined with a JHead-style hot end and MK7 drive gear powered by a NEMA17 motor. This setup features an integrated fan mount to actively cool the barrel of the hot end. It's designed for use with 1.75mm ABS/PLA filaments. Compatible components include the MK7 Replacement by whosawwhatsis, Prusa i3 Original X Carriage (Wide Version), J-Head Style HotEnd, and a compression spring from Blomker.com with specifications: steel alloy material, free length of 30.5mm, minimum working length of 19.9mm, outside diameter of 7.3mm, wire diameter of 1mm, load at minimum working length of 34.13N, and a spring rate of 3.26 N/mm.
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