This gritting unit manages without a hydraulic drive and can therefore be used on any vehicle that has a loading area. Current can be supplied through the normal vehicle battery. The screwconveyer of the gritting unit has to be mounted movable in order to compensate axial offset and dynamic movements in the screw. In addition, the bearings used must be resistant to the aggressive gritting salt. For these reasons, igubal® flange bearings EFSM and igubal® pivoting bearings KGLM from igus® are used.