Saw
device · 3000 BC · Ancient world
A tool with a toothed blade.
What it is made of
- Saw blade — has part. A toothed steel blade.
- Set saw teeth — has part. The set of the teeth widens the kerf so the saw does not bind.
- Handle — has part. A handle.
Principles and materials it uses
- Steel — is made of. The saw blade is steel.
- Copper — is made of. Egyptian saws were copper.
- Wedge — uses. Each tooth of a saw is a small wedge.
Where it is used
- Sawmill — is used in. The cutting tool is a saw.
- Jigsaw puzzle — is used in. Cut out with a fretsaw.
History: what it evolved from and what it influenced
- Chainsaw — evolved into. A mechanized saw.