Gears are some of the most important elements used in machinery. There are few mechanical devices that do not have the need to transmit power and motion between rotating shafts. Gears not only do this most satisfactorily, but can do so with uniform motion and reliability.
From aeroplanes to ships, from automobiles to locomotives, from medical devices to material handling equipment, everything is now expected to work at higher efficiency, be more reliable, be compact and cost lower. Gears form an integral part of all these machines.