Vertical roller mills are large grinding machines developed, designed and manufactured by Sinoma-tec, Sinoma-tec vertical mills feature a rational and reliable structure as well as an advanced process that combines drying, grinding, separation and conveying, which is suitable for grinding materials of different types and sizes, Sinoma-tec vertical mills are widely used in industries such as cement, power generation, metallurgy, chemical and coal processing, A Vertical mill consists mainly of motor, planetary gearbox, grinding table, grinding rollers, rocker arms, mill stand, mill housing, separator, water spray unit, pressure device, lubrication system, and rocker arm sealing.