A gear unit having a right-angled gear stage and a housing, wherein a first toothed part of the right-angled gear stage is connected non-rotatably to a shaft, wherein the shaft together with the first toothed part is rotatably mounted by way of a first bearing and by way of a second bearing, wherein the first bearing is accommodated in the housing and the second bearing is accommodated in the housing, wherein the housing has a first internal thread portion and a second internal thread portion spaced apart axially therefrom, wherein a threaded nut screwed into the first internal thread portion, in particular in the axial direction, presses on the outer ring of the first bearing, wherein the inner ring of the first bearing is adjusted against a step of the shaft, wherein a second threaded nut screwed into the second internal thread portion, in particular counter to the axial direction, presses on the outer ring of the second bearing wherein the inner ring of the second bearing is adjusted against the first toothed part, in particular against a step of the first toothed part, or against a step of the shaft, wherein a cover part is accommodated in the second threaded nut, in particular in an axially uninterrupted cutout of the second threaded nut arranged centrally in the second threaded nut, which cover part, in particular in an oil-tight manner, closes and/or covers an axially uninterrupted cutout arranged centrally in the second threaded nut, or that [sic] a shaft sealing ring is accommodated in the second threaded nut, in particular in an axially uninterrupted cutout of the second threaded nut arranged centrally in the second threaded nut, which shaft sealing ring, in particular in an oil-tight manner, seals off or covers towards the shaft, wherein the housing has a first housing part which has the first internal thread portion, and a second housing part which has the second internal thread portion, wherein the first housing part is connected to the second housing part by means of screwing, wherein the external diameter of the shaft in the axial direction decreases monotonically, in particular in a step-like manner, between the first and the second bearing, disregarding a groove in which a securing ring is accommodated. wherein a first toothed part of the right-angled gear stage is connected non-rotatably to a shaft, wherein the shaft together with the first toothed part is rotatably mounted by way of a first bearing and by way of a second bearing, wherein the first bearing is accommodated in the housing and the second bearing is accommodated in the housing, wherein the housing has a first internal thread portion and a second internal thread portion spaced apart axially therefrom, wherein a threaded nut screwed into the first internal thread portion, in particular in the axial direction, presses on the outer ring of the first bearing, wherein the inner ring of the first bearing is adjusted against a step of the shaft, wherein a second threaded nut screwed into the second internal thread portion, in particular counter to the axial direction, presses on the outer ring of the second bearing wherein the inner ring of the second bearing is adjusted against the first toothed part, in particular against a step of the first toothed part, or against a step of the shaft, wherein a cover part is accommodated in the second threaded nut, in particular in an axially uninterrupted cutout of the second threaded nut arranged centrally in the second threaded nut, which cover part, in particular in an oil-tight manner, closes and/or covers an axially uninterrupted cutout arranged centrally in the second threaded nut, or that [sic] a shaft sealing ring is accommodated in the second threaded nut, in particular in an axially uninterrupted cutout of the second threaded nut arranged centrally in the second threaded nut, which shaft sealing ring, in particular in an oil-tight manner, seals off or covers towards the shaft, wherein the housing has a first housing part which has the first internal thread portion, and a second housing part which has the second internal thread portion, wherein the first housing part is connected to the second housing part by means of screwing, wherein the external diameter of the shaft in the axial direction decreases monotonically, in particular in a step-like manner, between the first and the second bearing, disregarding a groove in which a securing ring is accommodated.