Marine gears are used in yachts, workboats, fishing boats and other marine machines. The choice of gears that Involute provides depends on various parameters and requirements beginning with the appropriate viscosity grade, which decides the use of gears for differing marine uses based on load, speed, operating temperature, and gear geometry. In marine machines, as the need for speed increases the viscosity of gears required decreases. Marine gears are used in many marine applications, such as centrifuges, main propulsion, and deck machinery like turning gears, elevators, rudder carriers, pumps, winches, windlasses and cranes. There are many kinds of marine gears that are used for various marine applications; they include worm gears bevel gears helical gears and planetary gears.