Every gear rotates in its proper place.

A bearing supported gear in a manual transmission will rotate synchronously with its shaft due to the dog-gear engagement.

Like machines in the factory, the gears rotate automatically to play the percussion instruments.

This gear rotates the seats forwards and backwards throughout the ride.

All versions of the Tatra differential have locking pins that can force the differential gears to rotate together, "locking" the differential.

Transmission gears are always in mesh and rotating, but gears on one shaft can freely rotate or be locked to the shaft.

When helical gears rotate, there is constant contact between gears, which results in quiet operation.

Since the gears are always rotating and can only be accessed sequentially, synchromesh is not generally needed.

The workpiece (or blank gear) rotates on a second shaft (spindle).

In this case, the planetary gears simply rotate about their own axes (i.e., spin) at a rate determined by the number of teeth in each gear.