Slide bearings - Wolf Kunststoff-Gleitlager GmbH

CCCCCC12.2.3.3.1. Working life at point stressAt point stress (bushing is standing, screw is rotating)the expected working life at point stress L pis calculatedby means of formula (25).L P∆D -∆h -se max0,06 • v • S G[25]Screw cavityPrefaceContentsin which:L P = working life for point stress [h]∆D = permissible increase of bearing clearance [µm]v = sliding speed [m/min]S G = total wear rate [µm/km] taken from chapter12.2.3.1.∆h = occuring screw cavity [µm]se max = max. installation bearing clearance [µm]12.2.3.3.2. Working life at peripheral stressAt peripheral stress (bushing is rotating, screw isstanding still) the working life L uis longer than that atpoint stress.As rule of thumb applies:LL = 2 • LUin which:U =P[26]working life at peripheral stress [h]LP= working life at point stress [h]MaterialoverviewIndex Slide bearings Slide bearings Conditions ofTribologyMathematical Design(with collar) (cylindrical) installationexample guidelinesWolf Kunststoff-Gleitlager GmbH • Heisenbergstr. 63 - 65 • 50169 Kerpen-Türnich • Tel. 02237/9749-0 • Fax. 02237/9749-2039