Agricultural equipment is not known for its quickness but for its longevity and dependability. Regardless of what an individual uses a tractor for, speed is not their goal but thoroughness is, which requires a sturdy and solid internal system. Tractors are known for using the most basic type of transmission, known as a gear box. Basically a system of gears that translate the raw power of torque from the motor into an amount that can be handled by the massive wheels of a tractor or similar piece of machinery, gear boxes may be simple speed reducers, but they are also rather magnificent in their simplicity. Other agricultural equipment that utilize the basic gear box design for their slow and steady work are snow blowers, manure spreaders and forage spreaders. More complex gear boxes are often used for wind turbine systems, which can power anything from the electricity in a single room to an entire city.
A more detailed description of a gear box involves explaining what exactly a gear is. A gear is shaped like a doughnut, round and with a hollow space in the center, although its edges are usually thick and full. Gears also contain teeth on the outer rim of their circle, teeth that encompass the whole of the rim, front to back. How many teeth an individual gear has depends on what kind of system it is being incorporated into, and where it belongs within the system. The teeth of a gear are how the gears connect to one another, and how they are able to control the amount of torque passing through them. A series of gears, in essence, is a gear box. How many are installed within the system, and how many teeth each one has effects how quickly the gears connected to the motor will turn and make the gears connected to the wheels turn.