Lesson 1Standards and terminology: ISO cleanliness codes, ASTM, NLGI, DIN/ISO references relevant to maintenanceThis part explains key lubrication standards and terms used in industry, including ISO cleanliness codes, ASTM and DIN/ISO test methods, and NLGI classifications, to help with clear talk and proper specs in maintenance work.
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, hydrodynamicThis part describes boundary, mixed, elastohydrodynamic, and hydrodynamic lubrication regimes, linking film thickness to surface roughness, load, and speed, and showing how knowing the regime helps pick lubricant and operating ways.
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 criteriaThis part looks at main lubricant base stock types like mineral, PAO, ester, and PAG fluids, comparing their physical and chemical properties, oxidation stability, seal compatibility, and cost to help choose right for different industrial jobs.
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 formationThis part explains NLGI grease consistency grades, how cone penetration shows hardness, and how consistency affects pumpability, channeling, and film formation in bearings and central systems under different temperatures and 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 limitsThis part looks at how dirt particles, water, and wrong mixed fluids spoil lubricants and parts, describing failure ways, cleanliness goals, water limits, and practical ways to check, stop, and fix contamination in use.
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 effectsThis part builds good knowledge of viscosity behaviour, viscosity index, ISO VG and SAE grading systems, and temperature-viscosity links, showing how to pick and check right viscosity for bearings, gears, and 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, detergentsThis part details common lubricant additive types like anti-wear, EP, antioxidants, rust and corrosion inhibitors, anti-foam agents, and detergents, explaining their jobs, limits, and how they affect lubricant choice and 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)This part covers lubricant compatibility rules, focusing on base oil types and grease thickener systems, how to read compatibility charts, risks of mixing, and safe changeover steps to avoid sludge, softening, 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 mechanismsThis part introduces basics of friction and wear, describing adhesive, abrasive, and fatigue wear, and explaining how lubrication ways form protective films that separate surfaces and make parts last longer.
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 usesThis part sorts oils, greases, and solid lubricants, explaining how their make-up differs, where each type is used, and how application method, speed, load, and surroundings guide choice of lubricant form in industrial machines.
Liquid oils and circulation systemsGreases for bearings and couplingsSolid lubricants: MoS2 and graphiteDry-film and boundary lube coatingsSelecting form based on duty cycle
