Nrb bearings supplies ball screw bearing units from ibc walzlarger gmbh. The bearing units are applicable for fixed end of ball screw as on the floating end of long ball screws. The high precision flange ball screw bearing units are adopted with increased seat diameter bigger as the ball screw nut so that they can be pre-mounted at ball screw shaft and assembled together into the machines. The service people of machine tool have shorter mounting time in case of crash to be solved. The company also supplies high precision pillow block units to be fixed with bolts and pins on flat surfaces. The ball screw bearing units are mounted with precise 60ยบ angular axial contact bearings, labyrinth seals for low friction and greased for life with special grease. These units are available in three preload levels light, medium and heavy according to needs regards stiffness and speed. The company supplies options like units with integrated locknut for preloading the whole assembly. For precise applications with long ball screws there are also spring-preloaded units available where disc springs compensate for heat elongation of the shaft. Another option for long ball screws is the use of special units for driven ball screw nuts.
