Abstract: A crusher having a pair of spaced rollers mounted on shafts. One of the rollers is moveable with respect to the other roller and the movement is by a pair of screw jacks in conjunction with a pair of toggle assemblies. The moveable roller is supported by moveable bearing housings at ends of its shaft. The toggle assemblies apply a force to the moveable bearing housings to slide each moveable bearing housing along a bearing support and a track located on each side of the crusher. Each roller comprises a pair of roll hubs mounted on the shaft, an expansion ring and a roll shell. Roll wedges are located between the expansion ring and the roll hubs and the roll wedges are drawn together by bolts to provide a radially outward force on the expansion ring which holds the roll shell in place.

Abstract: A crusher roller having a pair of roll hubs mounted on a shaft. Each hub has an external taper on its radially outer surface and an annular recess in each end adjacent to the inner surface. A shrink disc with an internal taper on the inner surface is positioned within each annular recess adjacent to the inner surface of the roll hubs. A circular wedge having an external taper on its outer surface is positioned between each shrink disc and the inner surface of each annular recess and bolts connecting the shrink discs in each roll hub for drawing the shrink discs together to secure each roll hub to the shaft. An expansion ring is mounted radially outward of the roll hubs and a roll shell is mounted on the outer surface of the expansion ring.