Ma nati otsekera bwino ndi zowonjezera pa ma screw drive. Amagwiritsidwa ntchito kuti akwaniritse kuyika kwa axial preload mu ma axial angular contact ball bearing a ma screw drive ndi ma axial/radial roller bearing a ma screw drive. Ma nati otsekera bwino amagwiritsidwanso ntchito m'magwiritsidwe ena komwe mphamvu zazikulu za axial ziyenera kuthandizidwa ndipo kulondola kwakukulu kwa axial run out ndi kulimba kumafunika.
