The little bolt hobbit

thingiverse

Improve your RepRap's extruder by creating precise, reproducible hobbet bolts with a little bolt hobbit and Proxxon Micromot 50 tool. The bolt hobbit creates a 32-tooth bolt with parallel, sharp teeth that have consistent dimensions, eliminating the need to recalibrate your firmware when changing extruders. You'll need M3 threaded rod, nuts, screws, plastic filament, washers (optional), a tensioner spring, and printed parts from the provided file. Assemble the frame, press nuts into the machine flange, and mount it to the frame. Attach the spring to hooks, insert a bolt into the gear, and mount the gear on the bolt hobbit. To hob the bolt, center the cutting disc tool, switch on the micromotor, cut one tooth at a time until you have a complete revolution, and check your results before reusing the disc.