Slide bearings - Wolf Kunststoff-Gleitlager GmbH

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CCCCCCLubricant additivesPrefaceAdditive Task Active substancesviscosity index improvement(VI-improvement)pour point reductionhigh pressure additives(EP-additives) anti-wearadditivesreduction of frictioncorrosion inhibitorsoxidation inhibitorsdetergentsdispersantsreduction of viscosity decrease withincreasing temperatureprevention of jam ( non-flow at lowtemperature)prevention of gubbling -up or of adhesivewear due to high stressreduction of the coefficient of slidingfrictionrestriction of corrosion of metallicmaterialsrecuction of oxidation of lubricating oilsprevention of segregation on materialsurfacesprevention of cold mud formationpolymerised olefins and isoolefin,polymetacrylates, polyalcylstyrolsa.o.condensation products ofchlorinated paraffine andnaphthalene, polymetacrylate a.o.organic sulphur-, phosphorus- andchlorine compounds and theircombinations a.o.fatty acids, fatty acid esters, fattyacid amides, fatty acid salts a.o.fatty acids, nitrogen-, phosphorusandsulphur compounds a.o.sulphur- and phosphoruscompounds, phenol derivatives,amines a.o.organo-metallic compounds suchas phenolates, sulphonates,phosphates, naphthentes a.o.amides, imides of polybasicorganic acidsdemulsifying agents separation of oil and water polar, surface active compoundsemulsifying agentsformation of emulsions ( for collinglubricants)alkaline salts of carboxylic acidsa.o.foam preventive methods prevention of foam formation silicone polymers a.o.Table 8: Lubricant additivesMode of actionextension of muddled molecules withincreasing temperatureadsorption on the surface of theparaffine crystals, hindrance of thegrowth of paraffine crystalsformation of reactive layers on thetribologically stressed surfacesformation of adsorbent and reactivelayers on the tribologically stressedsurfacesformation of protective layers whichdisturb the admission of oxygen andwater to the metal surfaceinterruption of the free-radical chainof oxidationprevention of the coagulation ofoxidation productspeptisation of oil-insoluble oxidationproductsincrease of the interfacial surfacetension between oil and waterdecrease of the interfacial surfacetension between oil and waterdestruction of oil skin which surroundthe air bubblesContentsMaterialoverviewIndex 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. 02237/9749-2022
CCCCCC7.3.2.Lubricating greasesLubricating greasesLubricating greases consist of a lubricating oil without or with additives and a soap in function of a thickeningagent.In general, the soap forms a fibrous skeleton which keeps the lubricating oil. Depending on the kind of soap wedistinguish between sodium greases, lithium greases, calcium greases, aluminium greases, barium greases andcomplex greases.PrefaceContentssodium grease lithium grease calcium greasethickener shape fiber fiber fiber fibercalcium complexgreasebentoniteplateletMaterialoverviewfiber length µm 100 25 1 10.5fiber diameter µm 1 0.2 0.1 0.1shortened form long fibrous medium fibrous short fibrous short fibrous short fibrouspropertiesdrop point ºC 150 -200 170 - 220 80 -100 250 - 300working temperatureupper ºC +120 +140 +60 +100under ºC -30 -40 -35 -30water resistance not resistant good very good very goodworked resistance 0,1mm 60 - 100 30 - 60 30 -60 250good very good limited limitedsuitability for slide bearings good good limitedmain applicationtransmissiongreasegeneral purposegreasegeneral purposegreaseprice average high low very highTable 9: Properties of lubricating greases7.3.3.Solid lubricants0.1round 300+150-20good30 - 60goodvery goodgoodhigh temperaturegreasevery highSolid lubricants are frequently employed for lubrications on extreme conditions e.g. at very high or very lowtemperatures, in aggressive chemicals, in vacuum or on conditions which do not permit a lubrication with oils orgreases for reasons of service engineering, safety engineering, environmental technology or healthy.When lubricating with solid lubricants the slide bearing mostly works in the area of mixed friction, so that whenoperating with e.g. metallic bearings only the emergency running properties improve.Index 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. 02237/9749-2023
Page 3 and 4: CCCCCCContents9.Damping ...........
Page 5 and 6: CC CC CCZX-100Astandard material2.
Page 7 and 8: CC CC CCZX-530bearing materialZX-55
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Slide bearings - Wolf Kunststoff-Gleitlager GmbH

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