Planetary friction drive from a ball bearing

The drive is built from a conventional ball bearing.
The blue outer ring is fixed to the base.
The inner ring is fixed to the jade shaft.
The pink shaft plays role of a carrier of the planetary drive.
N1/N2 = 2(R2/R1)
Where as
N1: speed of the jade shaft
N2: speed of the pink shaft
R1: radius of the inner ring circle created by contact points with the balls.
R2: radius of the outer ring circle created by contact points with the balls.
The ball radius R = (R2-R1)/2
In this video N1/N2 = 2.6
The two shafts rotate in the same direction.
The red spring creates the friction forces between the balls, inner and outer rings.

Видео Planetary friction drive from a ball bearing канала thang010146