Gears – Revolving And Evolving

May 22 2014

Gear, gears, drivetrain, gearbox

A gear is normally but not exclusively a rotating machine part with teeth or cogs. When two gears mesh in a rotating machine they impart motion from one to the other, the motion will change direction. Rotation speed and torque can remain the same, increase or decrease depending on the gears relationship to each other. When two gears mesh in this way we have a transmission or a drivetrain. Put a number of these gears into a housing, with an input shaft and an output shaft and what we have is generally known as gearbox.