A number of gears are
manufactured using different materials and with different performance
specifications depending on the industrial application. These gears are
available in a range of capacities, sizes and speed ratios, but the main
function is to convert the input of a prime mover into an output with
high torque and low RPM. These range of gears find use in almost every
industry right from agriculture to aerospace, from mining to paper and
pulp industry. Some of the popular types of gears in use are :