Ecoman manufactures Smooth Double Roll Crushing Machine. Ecoman offers Jaw Crushers, Impactors, Vertical Shaft Impactors, Hammer Mills, Lump Breakers, Vibrating Screens, etc. The Smooth Double Roll Crushing Machine is mainly used as secondary and tertiary crushers where narrow spectrum of grain analysis is desired, i.E. With given setting say "S" Most of the product gains lay near to "S". Reduction Ratio less than 1:4 and rolls can be set to 0.5 to 0.8 mm. Feed size, setting & roll diameter are to be so selected that the material gets nipped.