Lesson 1Safe Pressure Levels and Regulator Settings for Cutting Mild Steel PlatesThis lesson sums up safe oxygen and fuel pressure levels for cutting mild steel plates, how to adjust regulators properly, and read gauges. It stresses avoiding too much pressure, backfires, and bad cuts by using steady, balanced settings in your workshop.
Pressure levels by plate thicknessAdjusting and balancing regulatorsReading and understanding gaugesAdjusting for heating and starting cutsSpotting signs of unsafe pressuresLesson 2Basics of Metal Properties for Carbon and Mild Steel in Oxy-Fuel Cutting (Thickness, Burning, Heat-Affected Area)This lesson introduces simple metal properties of carbon and mild steel for oxy-fuel cutting. It explains burning, how heat affects the area around the cut, thickness impacts, and how the steel's makeup and structure affect cut quality and bending.
Carbon amount and steel typesHow iron burning helps in cuttingHeat-affected area and hardness changesThickness, weight, and heat movementImpacts on bending and twistingSpotting metal faultsLesson 3Cutting Methods for Straight, Even Cuts (Torch Angle, Speed, Heating, Starting Piercing)This lesson explains how to hold the torch for straight, even cuts, including right torch angle, distance from work, and speed. It covers heating time, starting and ending tabs, piercing methods, and keeping a steady cut line.
Torch angle and tip distanceHeating time and melt pool formingPiercing steps and safetyControlling speed and cut widthUsing starting and ending tabsKeeping steady hand movementLesson 4Cleaning and Preparing Edges After Cutting (Grinding, Removing Slag, Checking Sizes)This lesson details cleaning cut edges with chipping, grinding, and filing. It explains removing slag and waste, smoothing burrs, and checking sizes with tools and squares to ready edges for welding, fitting, or more work.
Safely removing slag and wasteGrinding and smoothing cut edgesSmoothing holes and cornersChecking evenness and angleMeasuring length and straightnessPreparing edges for weldingLesson 5Marking, Planning, and Measuring for Cutting Rectangular Frame Parts (Scribing, Squares, Templates)This lesson covers accurate planning for rectangular frame parts using squares, scribing tools, and templates. It explains choosing base points, transferring sizes from drawings, and marking ways that stay clear but don't harm the surface much.
Reading drawings and sizesChoosing base points and reference edgesUsing squares, tapes, and rulersScribing and punching center linesUsing templates and guidesChecking diagonals and evennessLesson 6Checking and Testing for Leaks Before Use (Visual Check, Soap Test, Flashback Device Checks)This lesson outlines steps to check cylinders, hoses, regulators, and torch before use. It explains using soap water for leak tests, checking flashback devices, and confirming valves and connections to stop gas leaks, flashbacks, and tool failures.
Visual checks of hoses and jointsInspecting regulators and gaugesSoap water leak test methodTesting flashback stoppersConfirming valve workNoting and tagging faultsLesson 7Oxy-Fuel System Parts and Upkeep (Cylinders, Regulators, Hoses, Torch, Tips, Flashback Stoppers)This lesson describes oxy-fuel system parts and what they do, like cylinders, regulators, hoses, torch body, tips, and flashback stoppers. It covers basic upkeep, cleaning, and when to replace to keep things safe and working well.
Cylinder valves and fittingsRegulators and pressure controlHose types, colors, and careTorch body, mixers, and valvesTip types, cleaning, and wearFlashback stoppers and check valvesLesson 8Common Fixing Problems and Quality Checks (Undercut, Taper, Waste Buildup)This lesson focuses on spotting and fixing common cut problems like undercut, taper, drag marks, and waste buildup. It gives practical changes to speed, tip size, and pressures, plus easy quality checks for shop work.
Spotting undercut and washoutRecognizing taper and angle errorsCauses of heavy waste and drag linesAdjusting speed, height, and angleFixing pressure and tip problemsEasy visual and tool checksLesson 9Handling, Storing, and Identifying Cut Parts (Tagging, Stacking, Stopping Rust)This lesson explains safe handling and storing of fresh cut parts, including labeling, tagging, and direction marks. It covers stacking ways, using supports, and basic rust stopping to keep sizes accurate and trackable.
Tagging and part labelingMarking direction and fit sidesSafe lifting and hand handlingStacking, supports, and basesShort-term rust protectionShop storage notes and labelsLesson 10Choosing Gas and Tip Sizes for Common Plate Thicknesses (Acetylene vs Propane, Suggested Tip Numbers)This lesson covers picking oxygen-fuel gas mixes and tip sizes for common mild steel thicknesses. It compares acetylene and propane work, and lists usual tip numbers and flow rates for good, cost-saving cutting.
Comparing acetylene and propaneGas choice by thickness and jobMaker tip guides and infoPicking tip size and openingFlow rates and heating adjustmentEffects on cut speed and quality
