projections definition
is a representation of one side of an object transferred (or projected) into a flat surface perpendicular to it
projection example
an object enclosed in a clear six-sided box with each side projected onto the corresponding side of the box
angle used in ISO and ANSi
iso > first angle
ansi > third angle
Auxiliary view
additional views that are perpendicular to inclined surfaces
sectioning
show hidden features revealing parts to be dimensioned;
Letter A labels the section cut > corresponding section is labeled AA
3 section types
Full-Section Cut
Half-Section Cut
Aligned Section Cut
Full-Section Cut
Passes through the entire object to reveal interior features, primarily used for symmetrical items.
Half-Section Cut
Uses a 90° turn to cut away one-quarter of a symmetrical object, showing interior and exterior views at once.
Aligned Section Cut
Used for circular objects with asymmetrical holes by angling the cut to pass through those specific features.