Lesson 1Standards and terminology: ISO cleanliness codes, ASTM, NLGI, DIN/ISO references relevant to maintenanceDis part explain key standards and words for lubrication in industry, like ISO cleanliness codes, ASTM and DIN/ISO tests, and NLGI classes, so you fit talk and specify correct for 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, hydrodynamicDis part talk about boundary, mixed, elastohydrodynamic, and hydrodynamic lubrication ways, connecting film thickness to surface roughness, load, and speed, and how knowing di regime help pick lubricant and operate proper.
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 part look at main lubricant base types like mineral, PAO, ester, and PAG oils, comparing dem properties, how dem no spoil quick, seal fit, and price to help pick di right one for different 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 formationDis part explain NLGI grease grades, how cone penetration show hardness, and how consistency affect pumping, channeling, and film in bearings and systems under different heat and speed.
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 part show how dirt, water, and wrong mix fluids spoil lubricants and parts, talking failure ways, clean targets, water limits, and ways to check, stop, and fix dirt 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 effectsDis part build strong knowledge on viscosity, viscosity index, ISO VG and SAE grades, and heat-viscosity link, 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, detergentsDis part detail common additives like anti-wear, EP, antioxidants, rust inhibitors, anti-foam, and detergents, explaining wetin dem do, dem limits, and how dem affect pick and life of lubricant.
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 part cover lubricant mix rules, focusing base oil types and grease thickeners, how to read charts, risks of mixing, and safe change ways to avoid sludge, soft grease, or seal spoil.
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 part introduce friction and wear basics, describing adhesive, abrasive, fatigue wear, and how lubrication form 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 usesDis part classify oils, greases, solid lubricants, explaining how dem structure differ, where each one use, and how method, speed, load, environment pick di form for machines.
Liquid oils and circulation systemsGreases for bearings and couplingsSolid lubricants: MoS2 and graphiteDry-film and boundary lube coatingsSelecting form based on duty cycle
