Conically shaped gears that transmit power between shafts that have intersecting axes of rotation.

A type of bevel gear in which the teeth project perpendicular to the gear face.

A gear mounted to a straight rod, such that it moves in a linear fashion when torque is applied to it by a spur gear (known as the pinion gear).

In order for two gears to mesh, they need to have the same size (and shape) teeth on the same spacing, known as what?

The relationship between the numbers of teeth on two meshing gears used to transmit motion. It reflects the change in mechanical advantage resulting from the gears.

The ratio of output force to the input force applied to a mechanism is known as ___________________.

____________ gears come in pairs that mate together to transfer power between perpendicular shafts that have axes of rotation offset from one another. These gears resemble screws; as they spin they turn their mating wheel.