Lesson 1Standards and terminology: ISO cleanliness codes, ASTM, NLGI, DIN/ISO references relevant to maintenanceDis section explain key lubrication standards an terminology use in industry, includin ISO cleanliness codes, ASTM an DIN/ISO test methods, an NLGI classifications, fi make consistent chat an specification in maintenance programmes.
ISO particle cleanliness code structureASTM test methods for lubricantsDIN and ISO viscosity classificationNLGI grease consistency numberingReading lube labels and data sheetsLesson 2Lubrication regimes: boundary, mixed, elastohydrodynamic, hydrodynamicDis section describe boundary, mixed, elastohydrodynamic, an hydrodynamic lubrication regimes, linkin film thickness to surface roughness, load, an speed, an show how regime identification guide lubricant pickin an operatin practices.
Stribeck curve and key parametersBoundary lubrication characteristicsMixed lubrication in real contactsEHL in rolling element bearingsFull hydrodynamic film conditionsLesson 3Lubricant base stocks: mineral, PAO, ester, PAG — properties and selection criteriaDis section review major lubricant base stock types, includin mineral, PAO, ester, an PAG fluids, comparin dem physical an chemical properties, oxidation stability, seal compatibility, an cost fi support smart selection fi different industrial services.
API mineral base oil groupsPAO synthetics: strengths and limitsEster fluids: benefits and cautionsPAG fluids and water-mixable typesMatching base stocks to applicationsLesson 4NLGI consistency for greases and how consistency affects pumpability and film formationDis section explain NLGI grease consistency grades, how cone penetration relate to hardness, an how consistency influence pumpability, channellin, an film formation in bearings an centralized systems under varyin temperatures an speeds.
Cone penetration and NLGI gradesConsistency vs pumpability in linesChanneling and grease distributionEffect on film thickness in bearingsTemperature impact on consistencyLesson 5Contamination effects: particulate, water, and incompatible lubricants — consequences and limitsDis section look at how particulate matter, water, an incompatible fluids degrade lubricants an components, describin failure modes, cleanliness targets, water limits, an practical ways fi monitor, prevent, an fix contamination in service.
Particle-induced wear mechanismsWater contamination sources and limitsEffects of mixing foreign lubricantsCleanliness targets and ISO codesFiltration and dehydration practicesLesson 6Viscosity fundamentals: viscosity, viscosity index, ISO VG, SAE grades, temperature effectsDis section build solid understandin of viscosity behaviour, viscosity index, ISO VG an SAE gradin systems, an temperature–viscosity relationships, showin how fi pick an check di right viscosity fi bearings, gears, an hydraulic systems.
Dynamic vs kinematic viscosityViscosity index and its significanceISO VG grades and selection rulesSAE engine and gear oil gradesTemperature–viscosity charts and toolsLesson 7Additives: anti-wear (ZDDP), EP, antioxidants, rust/corrosion inhibitors, anti-foam, detergentsDis section detail common lubricant additive families, includin anti-wear, EP, antioxidants, rust an corrosion inhibitors, anti-foam agents, an detergents, explainin dem functions, limits, an how dem influence lubricant selection an life.
Anti-wear and EP chemistry basicsOxidation control and antioxidantsRust and corrosion inhibitor rolesAnti-foam and air release additivesDetergent and dispersant actionsLesson 8Basic lubricant compatibility and mixing rules (base oil and thickener compatibility)Dis section cover lubricant compatibility principles, focusin on base oil families an grease thickener systems, how fi read compatibility charts, risks of mixin, an safe changeover procedures fi avoid sludge, softenin, or seal damage.
Base oil family compatibility basicsGrease thickener compatibility matrixRisks of mixing incompatible lubricantsFlushing and changeover best practicesUsing OEM and supplier guidanceLesson 9Principles of friction, wear, and lubrication mechanismsDis section bring in di fundamentals of friction an wear, describin adhesive, abrasive, an fatigue wear, an explainin how different lubrication mechanisms form protective films dat separate surfaces an extend component service life.
Types of friction in machine elementsAdhesive, abrasive, and fatigue wearSurface roughness and contact areaRole of lubricant films in protectionRelating wear modes to field symptomsLesson 10Types of lubricants: oils, greases, solid lubricants, and their general usesDis section classify oils, greases, an solid lubricants, explainin how dem structures differ, where each type usually use, an how application method, speed, load, an environment influence di choice of lubricant form in industrial equipment.
Liquid oils and circulation systemsGreases for bearings and couplingsSolid lubricants: MoS2 and graphiteDry-film and boundary lube coatingsSelecting form based on duty cycle
