Movable jaw of jaw crusher is made in form of plate with hole in upper part for its suspension on eccentric shaft and is equipped with longitudinal projections on flat working surface. The protrusions along the length of the cheek are located on at least two sections, within each of which the projections are the same, the equivalent height of the projections and the pitch of their arrangement along the width of the cheek in each of the sections decrease in the direction of distance from the upper part of the plate; Note here that, at least within one section on the side of plate top, height of ledges decreases in direction of distance from plate top.
The utility model relates to grinding equipment, in particular to jaw crushers, and can be used in the chemical, mining and building materials industries.