DMK8 Directo - The Dual MK8 extruder, Direct version. PRUSA mount

thingiverse

Dual MK8 Extruder The Hobo (Cheap) Bondtech Extruder The patent-pending core of this extruder is the power transmission using the bolt axle, which is also used for the lever arm. Prusa Mount Version, by Order of Herr Commander <a href="https://www.thingiverse.com/Cata5/about">Nicolas</a>, Lord of All Things That No-One Cares I designed this extruder a year ago, long before I even knew a Bondtech gear existed in this material plane. Now I'm publishing it in two versions: direct and bowden. It uses two MK8 hobbed gears; one needs to be put on a drill and sanded (less diameter, more or less you need to take 0.3-0.4mm off of it). The gears need to be built using nylon - don't even bother with PLA or ABS. They are press-fitted. You will need three 5x75mm hexagon head bolts. Parts can be done in any material you like; try to avoid TPU or chocolate. If you want to use 1.75mm filament, assemble it without the MK8 gears and use a 2mm drill bit where you see fit. If you want to use 3mm filament... well, you get the point. Printing the nylon gears: it sucks. Yeah, try with horizontal expansion settings in Cura. Remember to put some grease in. Assembly Instructions: https://a360.co/2N8MTu8 Open that link and use your brain; gears may be a PITA. Proper BOM will be updated soon. Temporary "BOM": A shitload of strange ball bearings - this thing is made to last. Look at the assembly instructions. 3 - 5x8x2.5 6 - 5x13x4 ABS or PLA for the chassis. Nylon for the gears: two big ones, three small ones; print a shitload of them and play with %size and horizontal expansion. The small one in the stepper I think needs to be a bit small. Mostly M4 bolts. Two 55mm M3 bolts to grab the filament.