Standard_Parts_Catalogue

Page 1926 | 3.8 Adjusting, Moving with Guides, Spindles and Ball Rollers Linear Guide Rail Systems Precision, Technical Information Permissible height offset The fixed and floating bearing principle ensures that misalignments in the base construction are compensated. However, when using Type UV / UT and XV / XT rails, certain limits should not be exceeded. The following table shows the maxi- mum permissible angle of the height offset of the fixed and floating bearing rails. Please note that the load rating must be reduced by 30% once the specified value is reached. To calculate h 2 , the following equation should be used: h 2 = a x tan w, with the tabular values shown below used for w. Example: h 1 = 43, a = 650 mm, w max. = 0,171° h 2 = 650 mm x tan 0,171° = 1,94 mm h 1 w max. 18 0,057° 28 0,143° 35 0,151° 43 0,171° Guidance accuracy Linear guide rail systems feature the linear guidance accuracy shown in the diagram. Tolerance for mounted linear guide rail systems h 1 b h 2 x 18 +0,25/-0,10 +0,15/-0,16 +0,25/-0,25 ±0,20 28 +0,25/-0,10 +0,25/-0,10 +0,15/-0,35 ±0,20 35 +0,35/-0,10 +0,25/-0,10 +0,10/-0,30 ±0,20 43 +0,36/-0,10 +0,25/-0,10 +0,20/-0,35 ±0,20 In the combination of rails GN 2422 and cam roller carriages GN 2424, the following dimensions / tolerances exist. If several cam roller carriages are installed into one rail, an offset x can occur between the cam roller carriages which must be added to the dimension h 2 .