Operational difference: the non-perpendicularity of the plane of the flywheel and the crankshaft axis is eliminated, due to which the disk parts have practically no limitation of the service life when the friction linings are regularly changed.
The disc hub is made of 2 main parts, hinged together by means of balls. The design automatically during operation eliminates all misalignments between the clutch shaft, pressure plates and flywheel, which is not ensured when operating tractors with hard disks.