Screw
principle · 250 BC · Ancient world
A simple machine: an inclined plane wrapped around a cylinder; turns rotation into linear motion.
Where it is used
- Screw press — is used in. The force is produced by turning a screw.
- Archimedes’ screw — is used in. A rotating helical surface lifts water.
- Worm gear — is used in. The worm is a screw.
- Jack — is used in. A screw jack.
- Propeller — is used in. A propeller “screws” itself into the water, like an Archimedes’ screw.
- Vice — is used in. The jaws are closed by a screw.
- Micrometer — is used in. A precise screw with a 0.5 mm pitch.
- Cheese press — is used in. A screw press.
- Corkscrew — is used in. A spiral.
- Screw thread — is used in. A thread is a screw.
- Auger — is used in. An auger is a screw.
- Lead screw — is used in. A lead screw is a screw.
- Screw press — is part of. A lead screw.
- Vice — is part of. A lead screw.
- Cheese press — is part of. A pressure screw.
History: what it evolved from and what it influenced
- Inclined plane — evolved from. A screw is an inclined plane wrapped around a cylinder.
- Screw thread — evolved into. A thread is an application of the screw.
What it is a kind of
- Simple machine — is a kind of. A screw is a simple machine.
- Lead screw — includes. A lead screw is a precision screw.
- Auger — includes. A propeller.