Geared double joint for robotics

Geared double joint for robotics. Original FreeCAD file is included.

Print two of everything. Shell halves and gears are mirror images.
Use 0.3 mm layers with no supports, no rafts. Print time on Ender3 is just under two hours.
Sand everything slightly for better fit.

There is a version with four 608 bearings.
Bearings are heavy and can be replaced by printed "fake 608 bearing" bushings.

Tripple joint is included for fun. It requires six 608 bearings.