Abstract: A heavy-duty transmission for the drive of a bowl-mill roller crushers, comprising a bevel gear stage (6; 7), a horizontal input drive shaft (5) and a vertical output drive shaft (8) and a multi stage planetary gearbox arrangement which is connected to the vertical output drive shaft (8) by a sun pinion (9) and is connectable to the grinding bowl of the roller mill by an output flange (3). Planetary wheels (10) engageable into the sun pinion (9) are placed on a first plane on a planetary wheel support (14) which is connected to the output flange (3). On a second plane, other planetary wheels (15) are arranged in such a way than the axes of rotation thereof are connected to a gear housing (2) and which are engageable into a ring gear (20) connected to the support of the planetary wheels (14) and are engaged into the sun pinion (19) of an intermediate gear wheel (17), which is also provided with a ring wheel (18) which gearing from outside into the planetary wheels (10) on the first plane.