Technical Drawing & CAD

The tolerance frame and datums, all fourteen ISO 1101 geometrical tolerance symbols in five groups, and what a tolerance zone really is.

Isometric, dimetric, trimetric and oblique projections; the box method for isometric drawing; and the rules of freehand sketching.

The difference between assembly and detail drawings, item number (balloon) rules, the parts list and title block, and parts never hatched in section.

An eight step method for reading any technical drawing, a fully worked example part, choosing the datum origin, and deriving the operation sequence.

A searchable glossary of 38 technical drawing symbols — geometrical tolerances, frame modifiers, surface texture marks and dimensioning symbols — with what each means at the machine.