The wood pellet machine market includes a variety of pellet mills, although the two main types are the flat die and ring die designs. Each wood pellet machine has certain advantages and disadvantages, but for residential and farm use the flat die pellet mill is most common.  The flat die pelleting machine was first invented in the early 20^th century to make feed. However after improving the quality of dies and rollers to handle additional pressure, the pellet press became suitable to produce wood pellets from biomass materials such as sawdust, straw, stalks and grass.

Wood Pellet Machine with Electric Motor: