How it Works: Crushers, Grinding Mills and Pulverizers
to a size 1/10 to 1/25 of the original. VSI crusher. Vertical shaft impactors (VSI) have a vertical shaft and enclosed rotor that turn at high speeds. There are two main types of VSI crushers, rock-on-rock (autogenous) and shoe and anvil. Rock-on-rock crushers have pockets filled with rock lining the entire circumference of the chamber.