Topic: Diameter, Length and Temperatures for Drill Bit
Hello! I will build a filament extruder for PET plastic only and I will use a wood drill as a screw. I am in doubt about the relationship between the diameter and length of the thread (L/D). I am thinking of using a drill bit 18mm in diameter by 360mm in length (L/D = 20). Is this an appropriate measure? What about temperatures in the compression and melting zones?
Sincerely Yours