Tools & manufacturing · c. 1818

Milling machine

A rotating multi-tooth cutter shapes metal parts to a template.

Milling machines emerged in New England armories by about 1818, associated with Simeon North and Eli Whitney. They made accurate flat and profiled parts in quantity.

See it in the living tree Wikipedia

Arcs above join it to what it stood on, arcs below to what it led to. The bar places this stretch on the tree's whole timeline.

What it built on 1

Screw-cutting lathe 1800

What it led to 2

Interchangeable parts 1824
Numerical control 1952

Related measurements

The dashed line marks when it first worked.

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