Steve Heather is a former Lecturer of Mechanical Engineering and Computer Aided Design in England, UK.  For the past 8 years, he has been a Beta Tester for Autodesk®, testing the latest AutoCAD® software and is a member of the AutoCAD® Customer Council.  He is the co-author of the bestselling series of Beginning and Advanced AutoCAD® Exercise Workbooks.  Previous to teaching, and for more than 30 years, Heather worked as a Precision Engineer in the aerospace and defense industries.

• Mathematical Formulas & Measurement - Solution of Right-Angled Triangles. Solution of Oblique-Angled Triangles. Areas & Dimensions Of Plane Figures. Volumes Of Solids. Distance Across Corners Of Hexagons & Squares. Coordinates For Locating Equally Spaced Holes. Sine Bar Calculations. Measuring Dovetail Slides. Calculating Countersink & Spot Drill Depths. Speeds & Feeds For Milling, Drilling, & Turning. Allowances For Sheet Metal Bending. Calculating Shearing Pressure For Blanking. Shear Strengths Of Materials For Blanking. Screw Thread and Drill Size Equivalent Charts- ISO Metric Coarse. ISO Metric Fine. UNC - Unified National Course. UNF - Unified National Fine. BA - British Association. BSW - British Standard Whitworth. BSF - British Standard Fine. BSP - British Standard Pipe. BSPT - British Standard Pipe Taper. NPT - National Pipe Taper. Fluteless (Cold Forming) Threads - Tapping Drill Sizes. Thread Repair Inserts - Tapping Drill Sizes. Fractional, Number, Letter, Metric & Decimal. Drill Size Equivalent Charts. Fasteners - Hexagon Socket Head Cap Screws. Clearance Drill, Counterbore & Key Sizes For Inch Series. Clearance Drill, Counterbore & Key Sizes For Metric Series. Hexagon Socket Flat CountersinkHead Cap Screws. Clearance Drill, Counterbore & Key Sizes For Inch Series. Clearance Drill, Counterbore & Key Sizes For Metric Series. Machine & Set Screw Identification Chart. Allowances and Tolerances - Terms Used For Preferred Fits On Holes & Shafts. Selected ISO Fits-Hole Basis. Clearance Fits. Transition Fits. Interference Fits. Properties and Testing of Materials - Heat, Mass & Weight Of Elements. Hardness Comparison Table. Surface Textures. Drawing Standards - Drawing Sheet Sizes: US Customary Inch & ISO Metric. Line Types & Line Widths. ASME & ISO Orthographic Projections. ASME & ISO Geometric Symbols Comparison Chart. Common Drawing Abbreviations Used. Computer Numerical Control - Letter Addresses Used In Numerical Control. G-Code Addresses. Miscellaneous Functions (M-Codes). Conversion Factors - Inches to Millimeters. Millimeters to Inches. Fractional Inches to Millimeters. Fractional Inches to Decimals. Common Conversion Factors: Metric to Imperial. Imperial to Metric. Index.

Steve Heather is a former Lecturer of Mechanical Engineering and Computer Aided Design in England, UK.  For the past 8 years, he has been a Beta Tester for Autodesk®, testing the latest AutoCAD® software and is a member of the AutoCAD® Customer Council.  He is the co-author of the bestselling series of Beginning and Advanced AutoCAD® Exercise Workbooks.  Previous to teaching, and for more than 30 years, Heather worked as a Precision Engineer in the aerospace and defense industries.

• Mathematical Formulas & Measurement - Solution of Right-Angled Triangles. Solution of Oblique-Angled Triangles. Areas & Dimensions Of Plane Figures. Volumes Of Solids. Distance Across Corners Of Hexagons & Squares. Coordinates For Locating Equally Spaced Holes. Sine Bar Calculations. Measuring Dovetail Slides. Calculating Countersink & Spot Drill Depths. Speeds & Feeds For Milling, Drilling, & Turning. Allowances For Sheet Metal Bending. Calculating Shearing Pressure For Blanking. Shear Strengths Of Materials For Blanking. Screw Thread and Drill Size Equivalent Charts- ISO Metric Coarse. ISO Metric Fine. UNC - Unified National Course. UNF - Unified National Fine. BA - British Association. BSW - British Standard Whitworth. BSF - British Standard Fine. BSP - British Standard Pipe. BSPT - British Standard Pipe Taper. NPT - National Pipe Taper. Fluteless (Cold Forming) Threads - Tapping Drill Sizes. Thread Repair Inserts - Tapping Drill Sizes. Fractional, Number, Letter, Metric & Decimal. Drill Size Equivalent Charts. Fasteners - Hexagon Socket Head Cap Screws. Clearance Drill, Counterbore & Key Sizes For Inch Series. Clearance Drill, Counterbore & Key Sizes For Metric Series. Hexagon Socket Flat CountersinkHead Cap Screws. Clearance Drill, Counterbore & Key Sizes For Inch Series. Clearance Drill, Counterbore & Key Sizes For Metric Series. Machine & Set Screw Identification Chart. Allowances and Tolerances - Terms Used For Preferred Fits On Holes & Shafts. Selected ISO Fits-Hole Basis. Clearance Fits. Transition Fits. Interference Fits. Properties and Testing of Materials - Heat, Mass & Weight Of Elements. Hardness Comparison Table. Surface Textures. Drawing Standards - Drawing Sheet Sizes: US Customary Inch & ISO Metric. Line Types & Line Widths. ASME & ISO Orthographic Projections. ASME & ISO Geometric Symbols Comparison Chart. Common Drawing Abbreviations Used. Computer Numerical Control - Letter Addresses Used In Numerical Control. G-Code Addresses. Miscellaneous Functions (M-Codes). Conversion Factors - Inches to Millimeters. Millimeters to Inches. Fractional Inches to Millimeters. Fractional Inches to Decimals. Common Conversion Factors: Metric to Imperial. Imperial to Metric. Index.

Steve Heather is a former Lecturer of Mechanical Engineering and Computer Aided Design in England, UK.  For the past 8 years, he has been a Beta Tester for Autodesk®, testing the latest AutoCAD® software and is a member of the AutoCAD® Customer Council.  He is the co-author of the bestselling series of Beginning and Advanced AutoCAD® Exercise Workbooks.  Previous to teaching, and for more than 30 years, Heather worked as a Precision Engineer in the aerospace and defense industries.

• Mathematical Formulas & Measurement - Solution of Right-Angled Triangles. Solution of Oblique-Angled Triangles. Areas & Dimensions Of Plane Figures. Volumes Of Solids. Distance Across Corners Of Hexagons & Squares. Coordinates For Locating Equally Spaced Holes. Sine Bar Calculations. Measuring Dovetail Slides. Calculating Countersink & Spot Drill Depths. Speeds & Feeds For Milling, Drilling, & Turning. Allowances For Sheet Metal Bending. Calculating Shearing Pressure For Blanking. Shear Strengths Of Materials For Blanking. Screw Thread and Drill Size Equivalent Charts- ISO Metric Coarse. ISO Metric Fine. UNC - Unified National Course. UNF - Unified National Fine. BA - British Association. BSW - British Standard Whitworth. BSF - British Standard Fine. BSP - British Standard Pipe. BSPT - British Standard Pipe Taper. NPT - National Pipe Taper. Fluteless (Cold Forming) Threads - Tapping Drill Sizes. Thread Repair Inserts - Tapping Drill Sizes. Fractional, Number, Letter, Metric & Decimal. Drill Size Equivalent Charts. Fasteners - Hexagon Socket Head Cap Screws. Clearance Drill, Counterbore & Key Sizes For Inch Series. Clearance Drill, Counterbore & Key Sizes For Metric Series. Hexagon Socket Flat CountersinkHead Cap Screws. Clearance Drill, Counterbore & Key Sizes For Inch Series. Clearance Drill, Counterbore & Key Sizes For Metric Series. Machine & Set Screw Identification Chart. Allowances and Tolerances - Terms Used For Preferred Fits On Holes & Shafts. Selected ISO Fits-Hole Basis. Clearance Fits. Transition Fits. Interference Fits. Properties and Testing of Materials - Heat, Mass & Weight Of Elements. Hardness Comparison Table. Surface Textures. Drawing Standards - Drawing Sheet Sizes: US Customary Inch & ISO Metric. Line Types & Line Widths. ASME & ISO Orthographic Projections. ASME & ISO Geometric Symbols Comparison Chart. Common Drawing Abbreviations Used. Computer Numerical Control - Letter Addresses Used In Numerical Control. G-Code Addresses. Miscellaneous Functions (M-Codes). Conversion Factors - Inches to Millimeters. Millimeters to Inches. Fractional Inches to Millimeters. Fractional Inches to Decimals. Common Conversion Factors: Metric to Imperial. Imperial to Metric. Index.