COMPACT RAIL (pdf; EN) - Rollon

5 Technical instructionsPreloadPreload classesThe factory installed systems, consisting of rails and sliders, are availablein two preload classes:Standard preload K1 means a rail-slider combination with minimum preloadwhich means the rollers are adjusted free of clearance for optimalrunning properties.Usually preload K2 is used for rail-slider systems for increasing the rigidity(see pg. 38ff). When using a system with K2 preload a reduction of theloading capacities and service life must be taken into consideration (seetab. 30).Preload classReduction yK1 -K2 0.1Tab. 30This coefficient y is used in the calculation formula for checking the staticload and lifetime (see pg. 52, fig. 75 and pg. 56, fig. 92).The excess is the difference between the contact lines of the rollers andthe raceways of the rail.Preload classExcess*[mm]Rail typeK1 0.01 allK20.03 T, U...180.04 T, U...280.05 T, U...350.06* Measured on the largest interior dimension between the racewaysT, U, K...43,T, U, K...63Tab. 3148 www.rollon.com