pulley

Also known as drum, block

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.

AI overview

A pulley is a wheel mounted on a shaft that allows a cable or belt to run over it, changing direction or transferring power from one place to another. This simple mechanical device matters because it makes it easier to lift heavy objects and is fundamental to how many machines transfer and control movement.

AI-generated from the Wikipedia summary — may contain errors.

Key facts

Machine.name: Pulley
Machine.image: PulleyShip.JPG
Machine.caption: Pulleys on a ship. In this context, pulleys are normally known as blocks
Machine.classification: Simple machine
Machine.industry: Construction, transportation
Machine.wheels: 1
Machine.axles: 1

via Wikipedia infobox

~10 min read

Encyclopedic overview

9 sections

Contents

History
Block and tackle
Rope and pulley systems
Method of operation
Free body diagrams
Belt-and-pulley systems
See also
References
External links

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.

Excerpted from Wikipedia’s “pulley” article, available under the CC BY-SA 4.0 licence.