There are standardized SHAPES used to make custom structural parts with
only a saw and a drill press.

I make a lot of things out of aluminum and steel angle, flat bars,
tubing and drill rod.

In electronics we make almost all mechanical parts from 1/16" aluminum
sheet and heatsink extrusions.

You can make simple moving parts with round rod and bronze bushings
from a hardware store. Model airplane stores have a fairly good
selection of useful items such as tedlescoping brass tubing.

jw

jw