Below is a list of Miniature Motors manufacturers from St. Louis, Missouri. Miniature motors, also referred to as micro motors or small motors, are fractional horsepower motors that must fit the frame size and/or less than one horsepower requirements, as well as fit the size dimensions of a couple inches or less. The latest technology in miniature motors has produced motors that have size dimensions of only millimeters. Some advantages of miniature motors are increased precision, less required space and more efficient power generation.