a drive drum is disclosed for a belt conveyor that gearlessly drives a conveyed product . for example , at least one motor is located inside the drum shell , said motor being fixed to the drum shell by means of a motor frame on the shell and to a fixed drum shaft by means of a fixed motor frame on said shaft ; the drum shell is sealed on both sides by a base on the end face , said bases being provided with centric bearings that support the fixed drum shaft ; the two ends of the fixed drum shaft are mounted on shaft fixings ; at least one electric connection line , which extends inside or along the drum shaft , runs between a winding of the motor that is fixed to the fixed motor frame , on the shaft and an electric energy supply ; the motor has or have a cooling device for the winding ; and a coolant supply and a coolant drain of the cooling device and / or a coolant connection line extend inside or along the drum shaft .