Gears 1 and 4 are rigidly attached together and rotate about fixed axis A. Gear 1 meshes with gear 2 which rotates about fixed axis B-B. Gear 4 meshes with internal gear 5 which rotates about axis B-B. Gears 2 and 5 are rigidly attached to bevel gears 3 and 6 which mesh with bevel planet gear 7. Gear 7 is connected by a turning pair to carrier 8 which rotates about axis B-B. The speeds n₁ and n₈ of gear 1 and carrier 8 are related by the equation n₈=-n₁(z₁z₄-z₂z₅)/(2z₁z₅) where z₁, z₂, z₄ and z₅ are the numbers of teeth of gears 1, 2, 4 and 5. Gear 1 and carrier 8 rotate in opposite directions.
$2912$CxG,DR$