Standard_Parts_Catalogue

Page 1927 | 3.8 Adjusting, Moving with Guides, Spindles and Ball Rollers 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 Linear Guide Rail Systems Assembly, Technical Information Permissible lateral offset It is possible to compensate for angular defects and the offset of the mounting surface with the help of fixed and floating bearing rails. The permissible offset of cam rollers and cam roller carriages in the Type UT / UV rails is given by the values for x and z. The reference is the nominal middle of the raceway b m . A parallelism or angular error can thus be compensated for across the whole length of the rail, which corresponds to an offset from the sum of the values for x and z. h 1 b m x z 18 6,3 1,1 0,3 28 8,6 1,3 0,7 35 10,5 2,7 1,3 43 14,5 2,5 1,5 Support widths To guarantee the proper running motion, outside dimensions must be observed during the assembly of linear guide rail systems. Suitable components include supports at the rail and at the roller carriage which should not be smaller than the widths a or b. Also, forces acting from the outside can thus be transferred reliably from the linear guide rail systems without submitting the mounting screw to shear stress. Tightening torque When positioning the rails with countersunk mounting holes, Type UT and XT, make sure the surface is flat and the mating tapped holes are tapped deep enough so the flat head screw is flush with the rail. The specified tightening torque of the flat head screws must be maintained. h 1 a b 18 5 4 28 8 4 35 11 5 43 14 5 h 1 Screw A/F Drive Tightening torque in Nm 18 M 4 x  8 T20  3 28 M 5 x 10 T25  9 35 M 6 x 12 T30 14 43 M 8 x 16 T40 24