Definition
A saw whose teeth are shaped and sharpened to cut across the grain of wood, severing the wood fibers cleanly rather than splitting along them. In aircraft work, it is used when shaping or trimming wooden structural components such as spars, ribs, or formers.
Plain English
A saw made for cutting across the grain of a piece of wood, rather than along the length of it. Its teeth slice through the wood fibers sideways.
Context Anchor
Seen in aircraft maintenance and repair work involving wooden aircraft structures, forms, or shop woodwork.
Derivation
From 'crosscut' meaning to cut across. The name describes exactly what the saw does — it cuts across the direction the wood grain runs, as opposed to a rip saw, which cuts along the grain.
Why Pilots Care
Using the wrong saw on aircraft wood can tear the fibers and weaken the part. Crosscut saws give a clean cut across the grain, which matters when the piece will carry flight loads.
Intuition Check
Do not read “crosscut” as just any cut made sideways. In woodwork, it specifically means cutting across the grain of the wood.
Example Sentence 1
The mechanic used a crosscut saw to trim the wooden rib to its final length before fitting it into the wing.
Example Sentence 2
Using a crosscut saw on the spar repair kept the wood from splitting along the grain.