Unit 1: Introduction to Engineering Drawings

• Purpose of engineering drawings
• The role of ANSI standards
• Detail and assembly drawings
• Drawing sheet format - title block, revision block, parts list
• Drawing scale
• Visible and hidden lines
• Introduction to dimensions and tolerances

Unit 2: Multiview Drawings

• Orthographic projection
• Visualizing a part from principal views
• Auxiliary views
• Partial views
• Enlarged views
• Centerlines, break lines
• Drafting conventions

Unit 3: Sectional Views

• Visualizing a sectional view - cutting plane, cutting plane line
• Section line patterns and conventions
• Full section
• Half section
• Offset section
• Aligned section
• Broken-out section
• Auxiliary section
• Revolved section
• Removed section
• Drafting conventions

Unit 4: Dimensions and Tolerances, Part 1

• Definitions
• Dimension lines, extension lines, leaders, notes
• Units of measure
• Fractions vs. decimals
• Dual dimensioning
• Not-to-scale dimensions
• Reference dimensions
• Dimensioning angles, arcs and chords
• Specified dimension
• Limit dimensioning
• Plus-and-minus tolerancing
• How to calculate a tolerance

Unit 5: Dimensions and Tolerances, Part 2

• Chain dimensioning
• Baseline dimensioning
• Direct dimensioning
• Maximum material condition
• Least material condition
• Classes of fit
• Overview of Geometric Dimensioning & Tolerancing
• Surface finish specifications

Unit 6: Part Feature Specifications
How the most common part features are represented and dimensioned, including:

• Hole
• Slot
• Counterbore
• Countersink
• Counterdrill
• Spotface
• Chamfer
• Knurl
• Keyseat
• Fillets and rounds
• Screw threads