Standard LUCT/LUCF linear units have an open design and are made for applications with heavy loads and long travel distances. LUCT units from size 12 mm to 80 mm are equipped with rigid LBCT linear ball bearings or plain bearings, while LUCF units from size 12 mm to 50 mm are supplied with self-aligning LBCF 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. In addition, the clearance can be adjusted via the internal hexagon screw close to the opening of the housing.