Rack and pinion
part · 100 BC · Ancient world
A gear on a toothed rack: rotation ↔ linear motion.
Principles and materials it uses
- Bronze — is made of. Ancient rack gears were bronze.
- Torque — uses. The rotation of the pinion becomes the travel of the rack.
Where it is used
- Car — is part of. The steering gear is a rack and pinion.
- Boyle’s air pump — is part of. A rack and pinion moves the piston.
What it is a kind of
- Gear — is a kind of. A gear and a rack.