offer flexible design options to create economical linear slide systems. They are extremely lightweight and a perfect fit for low inertia and high acceleration. LUCR units from size 8 mm to 80 mm are equipped with rigid LBCR linear ball bearings or plain bearings, while LUCD units from size 12 mm to 50 mm are supplied with self-aligning LBCD linear ball bearings. All units are factory pre-greased and can be relubricated if necessary via the grease fitting. The grease fitting is also used for the fixation of the bearing in the housing. Exception is the size 8 mm unit, as it has bearings axially fixed with retaining rings.