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, like ISO cleanliness codes, ASTM and DIN/ISO test methods, and NLGI grades, to help with clear talk and 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 types, linking film thickness to surface roughness, load, and speed, and showing how knowing the type guides lubricant choice and operations.
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 types like mineral, PAO, ester, and PAG oils, comparing their properties, oxidation stability, seal fit, and cost to help choose right for different factory 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 grades, how cone penetration shows hardness, and how consistency affects pumping, channeling, and film in bearings and central systems under different heat 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 checks how dirt, water, and wrong mixes spoil lubricants and parts, describing failures, cleanliness goals, water limits, and ways to watch, stop, and fix contamination on the job.
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 solid knowledge on viscosity, viscosity index, ISO VG and SAE grades, and heat-viscosity links, showing how to pick and check right viscosity for bearings, gears, and hydraulics.
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 additives like anti-wear, EP, antioxidants, rust inhibitors, anti-foam, and detergents, explaining their jobs, limits, and how they affect choice and lifespan.
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 mixing rules, focusing on base oils and grease thickeners, reading charts, mixing risks, and safe switch methods 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 friction and wear basics, like adhesive, abrasive, fatigue wear, and how lubrication forms films to 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, solid lubricants, how they differ, where used, and how method, speed, load, environment pick the form for factory gear.
Liquid oils and circulation systemsGreases for bearings and couplingsSolid lubricants: MoS2 and graphiteDry-film and boundary lube coatingsSelecting form based on duty cycle
