3mm filament's v2 Infill 3D Bowden Geared Extruder with new bolt

thingiverse

I don't like Bowden extruders since my first ultimaker when every morning I found a broken PLA rod and had to disassemble the extruder. Who knows, it was hard work. But it had to be done for toolchanger. It turned out that my hobby bolts made in those times are very bad at driving a thick hard filament. But it is very easy to replace a hobby bolt with a new one made from an 8mm bolt on a lathe and now the extruder works just fine. It took me an hour because I'm a bad Turner. I haven't even changed my settings yet. If you can't sharpen the new hobby bolt, you can take a bolt of 5mm and a new gear 47 and fix it in gear47 any way you can: a shift, nail, Grover washer. Drive gear like this: https://www.ebay.com/itm/MK8-MK7-Drive-Gear-for-1-75-3mm-Filament-3D-Printer-Extruder-Pulley-5mm-Shaft/222907632708?hash=item33e6548c44:m:mNbrtpxb6sn7pD8l_GrN4rA I think my gear is for 1.75mm. I took quick release from https://www.thingiverse.com/thing:2789583. Test video https://youtu.be/SBd4bSMrrNs