Carrier 1 is designed as housing a which rotates about axle shafts A and B. Four identical planet worms 2 are connected by turning pairs to housing a and mesh with two worm wheels 3 of equal size, connected by turning pairs C to housing a, and two more worm wheels, 4 and 5, of equal size. Wheels 4 and 5 are keyed to axle shafts A and B. The speeds n₁, n₄ and n₅ of housing 1, and of worm wheels 4 and 5 (in rpm) are related by the equation n₁=(n₄+n₅)/2.
$2924$CxG,DR$