On heavy construction equipment, final drives transfer power fromthe drive train to the tracks using a system of gears designed toreduce speed and increase torque.if you visualize the great power trip force takes as it goes from engineto the movement of wheels or tracks,you'll see it passes through anumber of gears and shafts on it's journey. The final drive is that lastpart in a machine's powertrain system, and subsequently, the finalcomponent for increasing torque through gear reduction or changing the direction of power flow.Final drives exist across machine types, makes, and models and.though they often share many of the same basic concepts, final drives are implemented and designed in ways that are unique to theirpurpose, their machine type, and even the machine's manu facturer.
 

Torque is a measure of the amount of rotational force ofan object and in large machinery it's all (or at least mostlyall) about torque. If you've ever used any kind of systemof gears -- even an old 10-speed bike -- you alreadyknow that gears can quickly convert your power intospeed or torque, and vice versa. That's because therelationship between torque and speed is inverselyproportional - one goes up and the other goes down.A final drive uses a set of planetary gears (or a bull-and-pinion gear system) to convert force into torque one lasttime and, in doing so, allows the shafts, bearings, andgears to deliver power without being under the constantstrain of a high-torque system.Because of the high torque loads they routinely handleand their close connection to tires, tracks, or sprockets.final drives have to be designed to perform under intensecircumstances and absorb feedback while they work.When you see a bulldozer clearing a small mountaindown to flat land, you can thank the final drive for it'simportant part in the process.