6FT-40 is most popular model that is suitable for flour grinding purpose. It adopts double roller grinding theory. Two rollers rotates at opposite direction, and produces friction, squeeze, cutting to crush grain, then send to round sifter for extracting flour. All process goes under wind automatically. It is composed of power, feeding, grinding and separating. Capacity is big, flour quality is good. Suitable for business in agricultural areas, villages or small city towns.