6 O.D. 3 I.D.

thingiverse

Instructions Using the following settings: approximate number of teeth on sun = 9 number of teeth on planets = 7 allowed overhang = 0.75 tubing squish ratio = 0.5 tubing outside diameter = 6 mm tubing wall thickness = 1.5 mm tolerance = 0.15 number of twists = 1 winding factor = 6.7 turns per minute pulses per second = 45 pulses temperature control = 15 degrees Celsius tubing diameter = 51.7 millimeters number of planets in solar system = 3