This is the era of the Bonsai. As the physical scale of machines and electronic components shrink, there are new demands for miniaturized components, such as micro gear in micro assembling. Micro gears are mostly used in the electronics industry, where miniaturization is an on going process. Micro gears are either are mounted inside a gearbox or mounted off-axis from the input shaft. Micro gears can also be customized according to client requirements and specifications to make them suitable and compatible with various equipment. The advantages of using micro gears are many including zero backlash, despite being extremely tiny (1 mm or less), ultra precise accuracy, long operating life, compact design, high efficiency, and can withstand extreme environment conditions.