3-gear coupling 1

There is no bearing for the internal gear.
Z1 = Z2 = 20
Z3 = 30
Z1, Z2 are tooth numbers of the external gears.
Z3 is tooth number of the internal gear.
The external gears have the same velocity and rotation direction.
Velocity can be altered if Z1 differs from Z2

STEP files of this video:
https://www.mediafire.com/file/b8idqwrrycytnxi/3gearCoupling1STEP.zip/file
Inventor files of this video:
https://www.mediafire.com/file/gejecr6vcilr7al/3gearCoupling1Inv.zip/file

Видео 3-gear coupling 1 канала thang010146