Circular wide-face pinion 1 rotates about fixed axis A and meshes with circular face gear 2 which rotates about fixed axis B. Axes A and B intersect at right angles. Gear 2 is mounted eccentrically with respect to its geometric axis. Taking the sign of the angular velocities ω₁ and ω₂ of gears 1 and 2 into account, the average transmission ratio of the mechanism is i₁₂=ω₁/ω₂=-r₂/r₁ where r₁ and r₂ are the pitch radii of gears 1 and 2. The transmission ratio varies within the limits from i_min=(r₂-e)/r₁ to i_max=(r₂+e)/r₁ where e is the eccentricity of gear 2.
$2338$SG,3L$