Pulley
| Pulley | |
|---|---|
Pulleys on a ship. In this context, pulleys are normally known as blocks | |
| Classification | Simple machine |
| Industry | Construction, transportation |
| Wheels | 1 |
| Axles | 1 |
A pulley is a wheel on an axle or shaft enabling a taut cable or belt passing over the wheel to move and change direction, or transfer power between itself and a shaft.
A pulley may have a groove or grooves between flanges around its circumference to locate the cable or belt. The drive element of a pulley system can be a rope, cable, belt, or chain.