Techno Linear Motion Catalog47Technical InformationCombined Loading CapacityUsable LifeThe actual life expectancy achieved by a linear guideis known as usable life. The usable life can deviatefrom the calculated life expectancy.These conditions can lead to early defects:- alignment error between guide rails or guide elements- insufficient lubrication- oscillatory motion with very small strokes (rippling)- vibration during standstill (rippling)Due to the variation in installations and operatingconditions, it is not possible to determine the exactusable life of a linear guide in advance. The safestmethod to obtain a correct assessment of the usablelife is to compare cases with similar installations.When the loading direction of an element does notcoincide with one of the loading directions, this is theway the equivalent load is calculated as follows:P= F1+ F2for a force F and a moment M at the same time, thedynamic equivalent load is:P= F+ MxP[N]dynamic equivalent loadF[N]applied force = ÖF12+ F22F1[N]vertical components, see sketch (4)F2[N]horizontal components, see sketch (4)C0[N]static load in the direction of theapplied forceM[Nm]applied momentM0 [Nm]static moment in the direction of theapplied momentAccording to DIN standards, the dynamic equivalentload should not exceed the value P = 0.5 x C.H[m]single stroke lengthn[min]number of complete strokes per minutev[m / min] average travel speed(4)F2F1FC0M0(5)(6)1270.0750.01270.0750.01270.0750.022.012.612.613.57.57.5ZF1ZF1ZF2ZF2ZF3ZF3ModelBL1BL3bearingrollerbearingrollerbearingrollercarriagecarriagecarriagecarriagecarriagecarriageCo[N]3061.54701.73061.51440.74701.71440.7 4701.7 1440.7C[N]1598.12127.71598.1 2668.02127.72668.0 2127.7 2668.0F1stat [N]2648.04060.02648.0 2881.44060.02881.4 4060.0 2881.4F1dyn [N]1382.71840.31382.7 2531.91840.32531.9 1840.3 2531.9F2stat [N]3061.54701.73061.5 1440.74701.71440.7 4701.7 1440.7F2 dyn [N]1598.12127.71598.1 2668.0 2127.7 2668.0 2127.7 2668.0Mxstat [Nm]37.2175.037.2 80.8175.0164.7 175.0 164.7My stat [Nm]98.8151.898.8 129.7151.8201.7 151.8 201.7Mzstat [Nm]114.3175.5114.3 64.8175.5100.9 175.5 100.9Mxdyn [Nm]19.479.219.4 71.079.2144.7 79.2 144.7Mydyn [Nm]51.668.751.6 113.968.7177.2 68.7 177.2Mzdyn [Nm]59.779.459.7 120.179.4186.8 79.4 186.8Load and Moment Data(reference diagram on next page)NP1beltslide