grinder

with the proven use of gearless drive technology, the limitation of ag/ sag mill size due to gearing constraints has been eliminated. metso minerals is the worlds leading supplier of gearless ag/sag mills. the experience......with the proven use of gearless drive technology, the limitation of ag/ sag mill size due to gearing constraints has been eliminated. metso minerals is the worlds leading supplier of gearless ag/sag mills. the experience gained from installation and operation of these mills enables us to offer mills of up to 35,000 installed horsepower or more. today a single grinding line with a gearless sag mill and appropriate ball mills can process over 100,000 mtph. gearless ag/sag mills gearless drives (ringmotors) have been used on tumbling mills for several decades. the design features motor rotor elements bolted to a mill shell, a stationary stator assembly surrounds the rotor elements, and electronics covert the incoming current from 50/60 hertz to about 1 hertz. the mill shell actually becomes the rotating element of a large low speed synchronous motor. mill speed is varied by changing the frequency of the current to the motor. the ringmotor can be used to inch and spot the mill for maintenance. our engineers welcome the opportunity to assist you with circuit and circuit control design as well as start-up, operation, and optimization of the milling plant.