Pitch circle 45 mm (3 teeth), 60 mm (4 teeth), 75 mm (5 teeth).
The diameter of the rolling circle for the epicycloidal curves is all the same 30 mm.
The diameter of the center hole is 6.4 mm (that is suited for the use of M3 bolts for the shafts when the gears are printed in 1/2 scale.)
(Jan 13, 2014) Adding STL data of the 4 teeth helical gear
Case3x3.stl | 47.2KB | |
Case3x4.stl | 42.9KB | |
Case3x4scr.stl | 43.6KB | |
HelicalGear3L.stl | 40.5MB | |
HelicalGear3R.stl | 40.5MB | |
HelicalGear4L.stl | 54.0MB | |
SpurCGear3.stl | 1.2MB | |
SpurCGear4.stl | 1.6MB | |
SpurCGear5.stl | 2.1MB |