A housing assembly for a rock crusher having an eccentric shaft. The housing assembly has an interior side and an exterior side and comprises a first housing portion having an inner side, an outer side, and a plurality of grooves and being removably attached to the rock crusher, and a second housing portion having a plurality of grooves and being removably attached to the first housing portion. The housing assembly also comprises an inner ring having at least one inner ring housing groove and at least one inner ring pitman groove and being disposed on the interior side of the housing assembly, and an outer ring having at least one outer ring groove and being disposed on the exterior side of the housing assembly. The housing assembly is disposed around the eccentric shaft. A method for removably housing a bearing assembly on a rock crusher.

A jaw crusher has an operating mechanism comprising a rotatable shaft coupled to a movable jaw in order to translate rotation of the shaft into oscillatory movement of the jaw. The shaft comprises a coupling portion by which the shaft is coupled to the movable part, wherein, in at least one configuration, a central axis of the coupling portion is parallel with the shaft axis and the coupling portion is eccentric with respect to the shaft axis. The coupling portion is configurable to adjust the location of the central axis with respect to the shaft axis in order to adjust the eccentricity of the coupling portion with respect to the shaft axis, thereby correspondingly adjusting the oscillatory movement imparted to the movable jaw.

A jaw crusher has an operating mechanism comprising a rotatable shaft coupled to a movable jaw in order to translate rotation of the shaft into oscillatory movement of the jaw. The shaft comprises a coupling portion by which the shaft is coupled to the movable part, wherein, in at least one configuration, a central axis of the coupling portion is parallel with the shaft axis and the coupling portion is eccentric with respect to the shaft axis. The coupling portion is configurable to adjust the location of the central axis with respect to the shaft axis in order to adjust the eccentricity of the coupling portion with respect to the shaft axis, thereby correspondingly adjusting the oscillatory movement imparted to the movable jaw.