Techno Linear Motion Catalog18Technical Information4200200L =x 106L = life expectancy expressed in number of revolutionsCa= dynamic load rating (N) [for acme nuts, see design load columnon catalog pages].Fm= average axial load (N).Example:For 10 mm pitch screw,16 mm dia., Ca = 4200 N carryingan average axial load, Fm = 200 N (45 lbs.) the expected life is:L = x 106 = 9.261 x 109 revolutions.At an average of 1000 rpm this will result in:x= 154,000 hoursof expected operational life. Note that the nature of themotion (jerky, smooth, etc.) will affect the life expectancy.BALL & ACME SCREW ASSEMBLYLIFE EXPECTANCYCaFm339.261 x 109 revolutions1000 rpm1 hour60 minutes16 mm LIFE EXPECTANCYDynamic (Ca)StaticAxial Load (N)ScrewDia.PitchSPECIFICATIONS2.545510102020AXIAL LOAD (N)25 mm LIFE EXPECTANCYAXIAL LOAD (N)1616162516251625350026004600510042005100190035705500420072001260065001260025008800