Engineering Drawing + AutoCAD for Engineers & Hobbyists

Engineering drawing uses graphics to describe surfaces, edges, and contours with lines and circles, while text specifies diameter and distance.

Explore essential drawing instruments for engineering drawings, including drawing boards, compasses, protractors, set squares, drafting machines, pencils, erasers, and drawing paper, and learn their precise uses.

Learn to set up and use the drafting machine, including its two-arm drafter, upper clamp, scale with perpendicular squares, and protector head for angle measurement.

Learn how to select standard drawing sheet sizes (A4 to A1) for engineering drawings based on component complexity and storage. Master a doubling-plus-one trick to remember dimensions and plan layout.

Explore the layout of drawing sheets for engineering drawings, covering margins, borderlines, orientation marks, grid reference systems, title blocks, and bill of materials, plus assembly drawing considerations.

Explore the title block layout in engineering drawings, detailing part name, part number, scale, protection symbol, and revision date, and learn how sheet size and company format influence content.

Learn standardized folding techniques for engineering drawing sheets to enable easy cabinet or file storage, with folding rules and visible title block on A4 to A1 sizes.

Master engineering drawing lettering by understanding its concept, avoiding overwriting and erasing, practicing single-stroke lettering, and applying parameters such as capital height, edge, and gaps across vertical and inclined orientations.

Master drawing standards, tips, and best practices by setting up the drawing sheet, aligning the drafter, mounting the paper, and drawing horizontal and vertical lines with precise angles.

Define scale as the ratio of drawing size to actual size, and demonstrate scaling to enlarge small features for easy viewing and precise dimensions on engineering drawings.

Explore four scales in engineering drawing: full size, enlarging scale, reducing scale, and not to scale (NTS). Full size maintains the same dimensions for object and drawing.

Explore the concept of dimensions and the two types—functional and location dimensions—showing actual values like length, width, height, diameter, and relational position in engineering drawings.

Understand the structure of dimensioning for engineering drawings, including linear and radial dimensions, extension lines, dimension lines, arrowheads, the diameter symbol, and dimension values with alignment and external systems.

Apply the rules of dimensioning to ensure every feature is dimensioned, with outside, non-crossing dimensions in an aligned system, continuous arch and progressive dimensioning, and diameter, radius, spear symbols.

Explore tolerances in engineering design, learn how deviations from a base size are specified and interpreted, and compare unilateral and bilateral tolerance formats with practical examples.

Learn to read engineering drawings by identifying the part name from the title block, verifying sheets and updates, and checking scale, units, and projections before reading front views.

Explore geometrical constructions used in engineering drawing, including points and lines, bisecting lines, dividing lines, perpendiculars, parallel lines, circle divisions, arc bisectors, polygons, angle sectors, and tangents.

Master the construction of points, bonds, and lines to create highly accurate geometries. Practice drawing points and lines with a drafter for horizontal, vertical, and angular accuracy.

Learn to bisect a line using a compass, drawing arcs from endpoints, identifying intersection points, and connecting them to obtain the midpoint of line AB.

Learn to divide a line into six equal parts using a compass and arcs, marking A1 to A6, and then draw parallel lines to transfer the spacing.

Learn to drop a perpendicular from a point to a line using compass arcs and intersection points, and vice versa from a line to a point, in drafting practice.

Master drawing parallel and perpendicular lines to a reference line on a drawing sheet using a drafter. Align the scale, set reference points, and control line spacing.

Divide a circle into twenty equal parts using a compass and straightedge, drawing vertical and horizontal guides, intersecting arcs, and connections to form equal segments.

Apply a compass-based method to bisect an arc by drawing intersecting arcs to locate the intersection points and divide the arc into two equal segments for engineering drawing and AutoCAD.

Learn a universal compass-and-straightedge method to construct polygons, from square to hexagon, using arcs, circles, and midpoints to reproduce any polygon for engineering drawing.

Explore constructing an angle bisector with a compass and straightedge, using arcs from AB and AC to locate E and F, then connect A and B to form the bisector.

Learn to create a fillet between two perpendicular lines by drawing construction lines, setting a radius with a compass, and producing a tangential arc.

Create a tangent to a circle at a given point using a compass and arcs, then bisect and connect to establish the tangent, perpendicular to the line op.

Explore how a cone cut by a plane yields ellipse, parabola, hyperbola, or circle, depending on the plane’s angle and orientation.

Master constructing an ellipse via the arc of circle method, using a 120 mm major diameter and a 60 mm minor diameter.

Construct a parabola with a tangent meter, using a 120 mm base and 60 mm axis, by establishing a baseline, midpoint, perpendicular, and eight-part divisions.

Construct a parabola on a real drawing sheet using the tangent method with a base line, midpoint axis, compass-guided eight-part divisions, and a freehand tangent curve.

Construct a hyperbola using the directrix and focus method with eccentricity 3/2 and a 50 mm distance from directrix to focus.

Construct a hyperbola on a drawing sheet using drafter and compass, with focus at 50 mm and eccentricity three by two, locating vertices by five equal divisions.

Learn how a rolling circle traces a cycloid by a point on its circumference as it moves along a straight line, using eight divisions and compass arcs.

Construct a cycloid by tracing a point on a circle of 15 mm diameter as it rolls along a straight line, shown step by step on a drawing sheet.

Explore the geometry of standard solids, such as cylinder, cone, cuboid, cube, pyramid, prism, and tetrahedron, and how bases, axes, and generators define their shapes.

Learn how projection converts three-dimensional objects into two-dimensional representations, using parallel and perspective methods such as auto graphic, oblique, linear and aerial perspectives, and multi-view with first and third angle.

Compare parallel and perspective projection, explain orthographic projection with parallel projectors and three planes, and introduce isometric and oblique projections for engineering drawings.

Explore orthographic projection by visualizing a torch illuminating each face of a three-dimensional object to generate front, left, right, top, bottom, and back views on corresponding planes.

Explore basic production planes in 3d space: the vertical plane (VIP) and the horizontal plane (ATSB), learn the axes X, Y, Z, and generate orthographic projections from 3d objects.

Explore six orthographic projection views by placing the object in a box and directing light to generate front, left, right, top, bottom, and back views on a 2D sheet.

Learn the difference between first angle and third angle projection, a simple industry trick to identify a drawing’s projection, and how title block symbols indicate the projection type.

Learn how the orthographic projection renders a point into the front and top views using the first angle projection, and how the corresponding dimensions appear on each view.

Explore projecting lines on the vertical and horizontal planes, analyze true length and true angle, and identify traces of lines for lines parallel, perpendicular, or inclined to a plane.

deepen your understanding of orthographic projection techniques for solids. learn to project irregular objects and create an auxiliary view.

Draw the orthographic projection of a cuboid on a drawing sheet. Construct front and top views with a drafter, using 19 by 40 mm and 19 by 6 mm.

Generate orthographic projection views of a cylinder using two views, front in the x direction and top, with radius 25 and height 60.

Draw the cylinder views on a drawing sheet: front view as a 50 mm rectangle, top view as a circle of radius 25 mm, completing the orthographic projection.

Explore the projection of a cone onto two planes and generate its orthographic views, including the front view and the top view, with radius and height.

Draw the cone views on a drawing sheet using orthographic first angle projection; front view is a triangle with base and height, and top view is a circle with radius.

Project the example-1 model on three orthographic planes to generate front, left, and top views using first angle projection, determine visible faces, and verify dimensions.

Draw the views of example one on a drawing sheet, constructing the front and left-hand side views with a drafter. Complete the orthographic projection by adding lines and dimensions.

Explore the projection of example-2 to generate orthographic views—front, left, and top—in first-angle projection, with hidden lines and final dimensioned drawings.

Draw the front and left-hand side views of example two on a drawing sheet, establish hp and vp, set baselines, apply dimensions, and complete the orthographic projection.

Project example-3 onto orthographic planes to generate front, left side, and top views, using projector views and clear dimensions on the drawing sheet.

Draw the front, left side, and top views of exemplar three on a drawing sheet using baselines, dimensioning, and first angle projection to create a complete orthographic view.

Generate auxiliary projections for an object to reveal features hidden in views; see how an angled hole makes a circle appear as an ellipse and project onto an auxiliary plane.

Draw all views of example-4 on the drawing sheet using orthographic projection, including front, left-side ellipse, top views, and the auxiliary view of a 20 mm hole.

Examine sectional views by analyzing hole types such as general hole, deeper hole, counter bore, and counter sunk, and learn to generate dimensions from a central section using hatching lines.

Explore three types of sectional cutting planes—parallel, inclined, and mixed changing position—and learn how to use section lines to generate accurate section views that reveal interior geometries.

Explore how a triangular prism looks when cut by horizontal, vertical, and inclined planes, revealing front, top, and side views for sectional drawing.

Explore how horizontal plane, vertical plane, and angular plane produce circle, rectangle, and ellipse sectional views of a cylinder in top and side projections.

Explore how a square pyramid is cut by horizontal, vertical, and angular planes to generate sectional views, including front and side views, using three planes.

Explore how a cone forms conic sections when cut by planes: ellipse, circle, parabola, and hyperbola, from inclined, horizontal, generator-parallel, and vertical cuts.

Explore two essential sectional view types in engineering drawing: the full sectional view and the half sectional view, where the object is fully or half cut, with examples to follow.

learn to construct a full sectional view from a top view by projecting holes, defining center lines, and detailing depths, diameters, and taper angles for accurate representation.

Learn to construct half sectional views in engineering drawing by defining a section plane, projecting edges, and applying hatching to reveal internal features like countersink holes.

Explore the intersection and interpenetration of two cylinders, covering identical cylinders at 90 degrees, cylinders of different sizes, and angled cylinders, with engineering drawing views.

Explore intersection and interpenetration of a vertical cylinder with a prism, then examine a horizontal cylinder intersecting a prism, with front view, left-hand side view, top view, and isometric view.

Explore the intersection and interpenetration of a cone with horizontal, vertical, and inclined cylinders, with isometric views for each case, and preview isometric projections and transformations in the next lecture.

Learn the principles of isometric projection, where reference edges meet a 30-degree angle to the horizontal. Isometric views preserve true object dimensions and can be drawn in any orientation.

Learn how to generate isometric views from orthographic projections by constructing a horizontal line and two 30-degree lines, then transfer front and left views onto a cuboid.

Demonstrate isometric views of simple and compound solids by applying the 30-degree rule to tangents on the horizontal axis, illustrating cylinders, cones, cuboids, prisms, and pyramids.

Practice converting isometric views to orthographic projections by constructing the front and bottom views for example one, using the given dimensions and illustrating first angle projection.

Practice converting isometric views to orthographic projections by constructing front and side views from an isometric drawing, including centerlines, holes, dimensions, and hidden lines.

Practice converting isometric to orthographic views using example three, creating centerlines, circles, and dimensions to build front and bottom section views, and illustrate first angle and third angle projections.

Learn to convert orthographic views to isometric projections using a cuboid example, drawing three axes at 30 degrees and constructing the isometric view on a real drawing sheet.

Learn to convert orthographic views to isometric projections using example 2, constructing axes at 30 degrees and drawing horizontal and vertical lines to complete the isometric view.

Learn to convert orthographic views to isometric projections using example three, setting reference lines and 30-degree axes to construct the isometric drawing with semicircular portions.

Discover why CAD software revolutionizes engineering drawing by saving time and enabling easy edits. It stores drawings digitally, prints sheet sizes, and will cover CAD software types in next lecture.

Explore industry CAD softwares, distinguish simple drafting from 3D modelling, and review free alternatives such as BricsCAD, FreeCAD, LibreCAD, DraftSight, NanoCAD, and OpenSCAD, with AutoCAD as a focus.

Introduce AutoCAD, a CAD software, and demonstrate drawing features using lines, circles, rectangles, and arcs, then create, copy, edit, and dimension a front view and left side of a design.

Explore CATIA's 3D modeling and drafting tools to create engineering drawings from a model. Generate front, bottom, right, and isometric views with dimensions and sections, and see changes update automatically.

Explore AutoCAD 2018, a computer aided design tool from Autodesk used across mechanical, architectural, and graphic design fields. Learn about the 30-day trial and free access for students and educators.

Explore the AutoCAD 2018 user interface and workspaces, including drafting and annotation, basics, and 3D modelling, with the ribbon, quick access toolbar, and essential file and command workflows.

Master file handling in AutoCAD by closing and saving drawings, opening new files in metric or imperial templates, and saving in AutoCAD 2004 for broad compatibility.

Explore the evolution of AutoCAD user interfaces from 2015 to 2020 by comparing 2015, 2016, 2017, 2018, 2019, and 2020 versions, and learn to work confidently across these interfaces.

Explore the AutoCAD 2018 user interface, including drafting and annotation workspaces and 3D modelling, and master key UI elements like the quick access toolbar, ribbon, view cube, and command window.

Compare the user interfaces of AutoCAD 2015 and 2018, highlighting icon differences and the 2018 notification panel, while demonstrating similar workflows for creating new files and drawing circles.

Compare AutoCAD 2017 and 2018 user interfaces, noting similar icons and start screens. The ribbon and interface color are largely the same, with minimal differences in drawing files.

Compare the AutoCAD 2019 and 2018 user interfaces, noting similar tool functionality and slightly different icons, with 2019 offering a more modern look while keeping core drawing commands unchanged.

Compare the AutoCAD 2020 and 2018 user interfaces, noting color themes, start screens, and icon layouts, while circle tool prompts remain consistent.

Compare the user interface of AutoCAD 2021 and 2018, noting similar ribbons and tool layouts, and learn that geometry creation procedures remain consistent for learners.

Explore AutoCAD 2018, 2021, and 2022 interfaces, noting color themes and consistent tools, with the same new file and circle operations across versions.

Learn visual control tools, object snapping, and selection strategies in AutoCAD, using line commands, ortho constraints, end-point and midpoint snaps, zoom, pan, and undo for precise drawing.

Master the offset method in AutoCAD to create parallel lines and rectangles by selecting objects, setting distances, and using spacebar to repeat commands, plus trim and extend operations.

Learn the offset method in AutoCAD by building a drawing from example two, setting distances, applying offsets, and trimming and snapping to endpoints and midpoints to refine geometry.

Learn to create a metric drawing in AutoCAD, apply linear, angular, and point-to-point dimensions, use trim and offset tools, and build orthographic projections (front, side, top views) for engineering drawings.

Develop a front view in AutoCAD, apply offsets, projections, and trimming, and finalize with precise linear dimensions to produce a complete engineering drawing.