A geared motor, having an attachable pinion, a shaft (6, 20) and a gear wheel (1, 2, 3), wherein the attachable pinion is connected to the shaft (6, 20) in a formlocked manner, wherein a pinion toothing of the attachable pinion meshes with a toothing of the gear wheel (1, 2, 3), wherein the rotational axis of the gear wheel (1, 2, 3) is oriented perpendicular to the rotational axis of the shaft (6, 20), wherein the contact region between attachable pinion and shaft overlaps, in particular truly overlaps, in a radial direction related to the rotational axis of the gear wheel (1, 2, 3), with the meshing region of the toothing with the pinion toothing, and/or wherein the radial clearance region covered by the contact region between attachable pinion and shaft related to the rotational axis of the gear wheel (1, 2, 3) overlaps with the radial clearance region covered by the toothing, in such a manner that the greatest radial clearance of the contact region is smaller than the greatest radiance clearance of the toothing, wherein a free space (7, 21) between attachable pinion and shaft (6, 20) overlaps, in a radial direction related to the rotational axis of the gear wheel (1, 2, 3), with the toothing wherein the free space (7, 21) issues to the surroundings at that end region of the attachable pinion remote from the gear wheel (1, 2, 3), characterised in that a region of the attachable pinion, which region is composed of an inner-cone-shaped region and an adjoining cylindrical region, bounds the free space (7, 21) in an axial direction and a region of the shaft (6, 20), which region is composed of a concave region in the shape of a body of revolution and an adjoining cylindrical region, bounds the free space (7, 21) counter to the axial direction. having an attachable pinion, a shaft (6, 20) and a gear wheel (1, 2, 3), wherein the attachable pinion is connected to the shaft (6, 20) in a formlocked manner, wherein a pinion toothing of the attachable pinion meshes with a toothing of the gear wheel (1, 2, 3), wherein the rotational axis of the gear wheel (1, 2, 3) is oriented perpendicular to the rotational axis of the shaft (6, 20), wherein the contact region between attachable pinion and shaft overlaps, in particular truly overlaps, in a radial direction related to the rotational axis of the gear wheel (1, 2, 3), with the meshing region of the toothing with the pinion toothing, and/or wherein the radial clearance region covered by the contact region between attachable pinion and shaft related to the rotational axis of the gear wheel (1, 2, 3) overlaps with the radial clearance region covered by the toothing, in such a manner that the greatest radial clearance of the contact region is smaller than the greatest radiance clearance of the toothing, wherein a free space (7, 21) between attachable pinion and shaft (6, 20) overlaps, in a radial direction related to the rotational axis of the gear wheel (1, 2, 3), with the toothing wherein the free space (7, 21) issues to the surroundings at that end region of the attachable pinion remote from the gear wheel (1, 2, 3), characterised in that a region of the attachable pinion, which region is composed of an inner-cone-shaped region and an adjoining cylindrical region, bounds the free space (7, 21) in an axial direction and a region of the shaft (6, 20), which region is composed of a concave region in the shape of a body of revolution and an adjoining cylindrical region, bounds the free space (7, 21) counter to the axial direction.