De que é feito gear
A toothed wheel that transmits rotation and changes speed and torque.
- Torque — utiliza. The gear ratio changes torque and speed.
- Bronze — é feito de. Ancient gears were bronze.
- Wood — é feito de. In mills — wooden ones.
- Ferro fundido — é feito de. Large gears of machines and mills were cast in iron: it fills a mould well and wears slowly.
- Plastic — é feito de. Small gears in toys, clocks and printers are plastic: light and quiet.