Hypocyclodic Gearbox
This is my sample hypocyclodic gear box that uses bearings instead of roller pins. It uses 11 SMR106 6x10x3mm bearings for the rollers, 2 6702 15x21x4mm bearings for the eccentric and 1 MR128 8x12x3.5mm bearing for the output.
This is just a demonstration gearbox to show the operating principles. It was part of my investigation into gearboxes for robot arms. (http://www.franksworkshop.com.au/wordpress/2018/03/03/3d-printed-hypocycloidic-gearboxes-ii/)
The pdf file is a 3d pdf which contains the whole 3d model and exploded animations.