BBE - Belt Bowden Extruder

thingiverse

UPDATE! - I've had problems with printing flexible materials, because sometimes the filament tangled up in the extruder; it works much better, since I countersunk the bottom of the PTFE coupling (watch the pics) *************************************************** This is a belt bowden extruder for 1.75mm filament; I mounted it directly to the frame of my P3steel, but you can use a metal or printed Nema 17 mount too; at next I will try it on my CeXY H-Bot MK2 https://www.thingiverse.com/thing:3383389 I used: - Nema 17 motor - GT2 belt ring 150mm (should work with rings up to ~160mm) - GT2 pulley 16 teeth (20 teeth will also work) - MK8 drive gear (ID 5mm; OD 9mm; L 11mm) - hard spring (ID 5mm; OD 7.5mm; L 10mm) - I cut a heat bed spring in half - 3x 625ZZ bearings (5x16x5) - PTFE coupling (6mm thread; countersink bottom --> pics) - M5x40 Hex - 2x M5x10 - 2x M5 lock nut - M3x25 - M3 lock nut - 3x M3x8 (min. for motor mount - add mounting material thickness) Happy Printing!