Tool coupling device for coupling a tool, in particular a tool for producing a thread or a threaded hole, to a drive, in particular a drive of a machine tool, comprising a) a drive shaft for coupling to the drive, b) an output shaft for coupling to the tool, wherein the output shaft rotates or is rotatable about a central axis, c) a transmission unit which is connected between the drive shaft and the output shaft and, in accordance with a transmission ratio, translates a rotary movement of the drive shaft at an input speed (n S) into a rotary movement of the output shaft at an output speed (n W) which is greater than the input speed (n S), and d) a non-rotating housing, e) wherein the transmission unit and at least one part (95, 95A, 95B, 95C) of the drive shaft coupled to the transmission unit as well as a part (18, 20, 15) of the output shaft coupled to the transmission unit are arranged inside the housing, f) wherein the drive shaft is rotatably mounted on or in the housing and g) wherein the output shaft is rotatably mounted exclusively on or in the drive shaft and is not rotatably mounted on or in the housing, h) in which the drive shaft, viewed in the axial direction with respect to the central axis, has an adapter for coupling to the drive and a carrier section, the carrier section having a rear bearing section, at least one intermediate section for coupling the transmission unit and a front bearing section which ends at an end face, the front bearing section and its end face, each intermediate section and the rear bearing section which ends at an end face, wherein the front bearing section and its end face, each intermediate section and the rear bearing section are arranged inside the housing and the adapter is arranged outside the housing, i) wherein the housing has a first opening for sealed passage of the output shaft and a second opening for sealed passage of the drive shaft and also the output shaft, and the central axis extends through the first opening and also the second opening, j) wherein the first opening is formed in an end wall of the housing, and k) wherein the front bearing section of the drive shaft extends forwards to just in front of the front housing wall and lies with the end face opposite the front housing wall. a) a drive shaft for coupling to the drive, b) an output shaft for coupling to the tool, wherein the output shaft rotates or is rotatable about a central axis, c) a transmission unit which is connected between the drive shaft and the output shaft and, in accordance with a transmission ratio, translates a rotary movement of the drive shaft at an input speed (n S) into a rotary movement of the output shaft at an output speed (n W) which is greater than the input speed (n S), and d) a non-rotating housing, e) wherein the transmission unit and at least one part (95, 95A, 95B, 95C) of the drive shaft coupled to the transmission unit as well as a part (18, 20, 15) of the output shaft coupled to the transmission unit are arranged inside the housing, f) wherein the drive shaft is rotatably mounted on or in the housing and g) wherein the output shaft is rotatably mounted exclusively on or in the drive shaft and is not rotatably mounted on or in the housing, h) in which the drive shaft, viewed in the axial direction with respect to the central axis, has an adapter for coupling to the drive and a carrier section, the carrier section having a rear bearing section, at least one intermediate section for coupling the transmission unit and a front bearing section which ends at an end face, the front bearing section and its end face, each intermediate section and the rear bearing section which ends at an end face, wherein the front bearing section and its end face, each intermediate section and the rear bearing section are arranged inside the housing and the adapter is arranged outside the housing, i) wherein the housing has a first opening for sealed passage of the output shaft and a second opening for sealed passage of the drive shaft and also the output shaft, and the central axis extends through the first opening and also the second opening, j) wherein the first opening is formed in an end wall of the housing, and k) wherein the front bearing section of the drive shaft extends forwards to just in front of the front housing wall and lies with the end face opposite the front housing wall.