A device for administering an injectable substance, the device including a housing, a translation member moveable in a translation direction, a rotation member rotatably moveable about a rotation axis and coupled to the translation member to support the translation member counter to the translation direction, a rotary bearing including a bearing body bearing the rotation member rotatably about the rotation axis, the rotary bearing having support surfaces for supporting the rotation member axially on the bearing body, and a device for reducing play whereby at least two support surfaces are brought into contact with a pressing force, thereby reducing an axial play of the rotary bearing.