Power tool attachment part with a torque sensor detecting radial forces

A power tool attachment part (1) for a power tool, comprising: an elongate housing (3) including an upper housing part (3a) and a lower housing part (3b) interconnected with the upper housing part (3a) An input gear (9) is configured to be connected to an output shaft of a power wrench, which input gear (9) is arranged at a first end of the housing (3). An output gear (11) has an output interface (11a). The output gear (11) is arranged at a second end of the housing (3). A first intermediate gear (13a) is arranged inside the housing (3) and configured to transmit torque of the input gear (9) to the output gear (11). The first intermediate gear (13a) is rotationally mounted on a first intermediate gear shaft (15a). A torque sensor (19) is configured to measure radial forces acting on the first intermediate gear shaft (15a) to thereby obtain a measure of the torque at the output gear (11).