Classification of Machine Drawing 2 Assembly Drawing 2 Part Drawing 2 Shop Drawing 2 Catalogue Drawings 4 Drawing for Instruction Manuals Schematic Representation 5 Patent Drawing 5 Layout of a Drawing Sheet 6 Drawing Sheet Sizes 6 Folding of Drawing Sheet 7 Scales 9 Lines ]0 Lettering II 1 Size and Position of Lettering 14 Conventional Representation I4 Machine components 14 Materials 14 Dimensioning 14 Types of Dimensioning 14 Dimensioning Terms and Notation Placing of Dimension I8 Multiple Choice Questions Review Questions 25 Theory of projections Kinds of Projection 27 2.3 orthographic Projections 29 2.4 Methods of Projection 29 2.5 Auxiliary Views 29 2.6 Missing Line Views 42 Procedure for Drawing Missing Lines 42 Shading of Section Views 54 Sectioning of Adjacent Parts 54 . Fits and tolerances Terminology 66 Standard Tolerances 68 Fits , 68 .Types of Fits 68 Selection of Fits 70 Hole Basis and Shaft Basis for Fits 71 4.7 Interchangeability 7] Dimensioning of Tolerances Rules 72 4.9 Limit Gauges 72 Machining Symbols 73 Indication of Surface Roughness 74 Methods of Placing Machining Symbols on Orthographic Views 76 Assembly drawings Classification of Working Drawings 84 Making Assembly Drawing from Details 84 Making Detail Drawings from Assembly 85 Freehand sketching Drawing Freehand Lines 89 .Drawing Centre Lines 90 Drawing Diagonals 90 Sketching Circles 90 Sketching Arcs 92 Sketching Ellipse 92 Types of Freehand Sketches 92 Orthographic Sketches 92 Isometric Sketches 93 Rules for Freehand Sketching 93 Temporary fasteners Screw Threads 96 Forms of Screw Threads 98 Forms of V-threads 98 Convention for Threads 103 Bolts and Nuts II0 Bolts II0 types of Bolts ]]0 Nuts Type of Nuts ]]7 Locking Arrangements for Nuts 123 Studs I25 Screws 126 Washers ' 127 Pins 128 Foundation Bolt 128 Circlips I3I Types of Keys 131 Splines 134 Cotter and Cotter Joints ]34 Sleeve and Cotter Joint 136 Gib and Cotter Joint 136 Spigot and Socket Joint 139 Knuckle or Pin Joint 140 Permanent fasteners bearings rivets I4B Caulking and Fullering I4B Types of Rivets 149 Types of Rivet Heads ]50 Types of Riveted Joints ]50 Terminology 155 Empirical Relations 155 Rivet Symbols 155 Welded Joints 156 Types of Welded Joints and S1mbols 157 Edge Preparation 160 Relation between the Arrow Line and the Weld Joint Position of the Arrow Line 161 Position of the Reference Line 162 Position of the Symbol with Regard to Reference Line Dimensioning of Welds 162 Size of Weld 164 Types of Bearings 167 Sliding Bearings 167 Antifriction Bearings 171 Hydrostatic Bearing 172 Prevention of Rotation of Brasses 172 Plummer Block or Pedestral Bearing 173 Angular Plummer Block 174 Swivel Bearing 175 Hangers and Brackets for Bearings 182 Couplings and clutches Types of Couplings 194 Rigid or Fast Couplings 195 Flexble Coupling Loose or Disengaging Coupling 199 Couplings for Shafts Out of Alignment 201 Clutches 205 Types of Clutches 205 Shafts and pulleys 212-222 Types of Pulleys 212 Cast Iron Pulley 212 Fast and Loose Pulleys 2]2 Stepped Pulley or Speed Cone 214 Split Pulley 214 Built-up Pull 215 Belt Pulley 2]5 Rope Pulley 215 Shafts 217 Materials for Shafting 2]7 Pipes and pipe jotnts Types of Pipe Joints 223 Joints for Steam Pipes 223 Joints for Hydraulic Pipes 225 Pipe Fittings 228 Gears Classification of Gears 237 Gear Terminology 239 Gear Calculations 241 Construction of Involute Profile 24] Approximate Involute Method 242 Drawing of Tooth Profiles 243 Cycloidal Teeth Generation 244 Construction of Spur Gears 245 Helical Gear 247 Bevel Gears 249 Worm and Worm Wheel, 2SI Conventional Represention of Gears 254 Steam engine and i.c. engine parts Steam Engine Components 258 Internal Combustion Engine Components 269 Boiler mountings and accessories Boiler Mountings 2B2 Safety Valve 282 Blow-off Cock 254 Steam Stop Valve 284 Feed Check Valve 286 Water Level Indicator 287 Pressure Gauge 287 Manhole 287 Fusible Plug 287 Boiler Accessories 287 Valves 288 Lift and Maximum Lift of the Valve 289 Machine tool parts Classification of Machine Tools 314 Basic Elements of Machine Tools 3 I 4 Lathe Machine 315 Screw-Jack 3I6 Bench Vice 317 DrllPress Vice 3]9 Crane Hook 319 Computer aided drafting Advantages of CAD Potential Applications of CADD The CAD System Central Processing Unit 352 Software 352 Storage 352 Processing Units 352 lnput Equipment 353 input Equipment 356 Computer Drafting Using AutoCAD 357 Coordinate Systems inAutoCAD 357 AutoCAD Commands