Standardised projections, dimensions and symbols communicate design intent.
Orthographic views, sections and auxiliary views convey shape; dimensions, tolerances, notes and title block convey requirements. Standards (ISO, ASME) specify line types and symbols. Drawings are legal manufacturing documents.
A shaft drawing lists diameters, tolerances, keyways and surface finish.
Engineering drawings are the legal and practical record of a design, so clear conventions prevent costly manufacturing mistakes.
Standardised projections, dimensions and symbols communicate design intent.
Engineering drawings are the legal and practical record of a design, so clear conventions prevent costly manufacturing mistakes.
Views of an object from principal directions, such as front, top and side, which together describe its shape completely.
They ensure everyone reads symbols and dimensions the same way, which reduces errors between design, production and inspection.
Typical applications include specifying the dimensions and surface finish of a shaft for a machinist, showing a weld symbol on a fabrication drawing and communicating a tolerance on a drawing sent to an overseas supplier.
Study "Tolerances and fits" first (topic 96 of 106 in Engineering Mechanics). It covers the groundwork this topic builds on.
First-angle vs third-angle projection. Datum references. Bill of materials.
A shaft drawing lists diameters, tolerances, keyways and surface finish.
The next topic is "CAD and parametric modelling", which builds directly on this one.
It is classed as Advanced in Engineering Mechanics (topic 97 of 106). It is an advanced topic. It assumes you are comfortable with the intermediate topics in Engineering Mechanics.
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