Abstract: The invention involves a gearbox 1, especially for adjustment devices in motor vehicles, with a plastic worm drive 10. The invention provides that the worm drive 10 has an encircling, circular flat contact surface 27 perpendicular to the worm axle and a number of removal pockets 22 in the form of recesses that are interposed axially between contact surface 27 and the worm axle and at the same time arranged in a level 29 recessed to the level of contact surface 27, whereby an encircling bevel 23 is formed in the transition area from level 29 of removal pockets 22 to the level of the circular contact surface 27.

Abstract: Drive for an adjustment device, comprising a worm wheel which has a globoid toothing with a central cylindrical section. The drive for an adjustment device, specifically, a seat adjustment device within a vehicle, has a spindle (5) and a gear mechanism (9) coupled thereto which has a drive worm (20) drivable by a motor (2). The drive worm (20) engages a worm wheel (40). The toothing of the worm wheel (40) has a central section with cylindrical toothing (Z), which section transitions on both sides into a globoid toothing (G) such that at least one complete annular surface remains on both ends of the worm wheel (40). A method according to the invention of fabricating this worm wheel provides for a cutter (60) which is moved vertically relative to the axis (A) of a worm wheel blank.