Abstract: A grate segment fastening system for an ore grinding machine, comprising a grate, including a top surface and a bottom surface opposite the top surface, wherein the top surface and the bottom surface are separated by a grate thickness, the grate being defined in use by an axis end, and a circumferential end opposite the axis side; wherein the grate is further defined by a second lateral surface, and a first lateral surface opposite the second lateral surface, the first lateral surface further comprising a raised mounting portion wherein at least one mounting bore extends into and through the body of the raised mounting portion, a plurality of throughput apertures extending through the grate from the top surface to the bottom surface and, a grate holder, including a top surface and a pulp lifter contact surface, opposite the top surface, the grate holder being defined by an axial end, and a circumferential end opposite the axial end, an anchor bore of predetermined transverse size extending from the top surfac

Abstract: A grate segment fastening system for an ore grinding machine, comprising a grate, including a top surface and a bottom surface opposite the top surface, wherein the top surface and the bottom surface are separated by a grate thickness, the grate being defined in use by an axis end, and a circumferential end opposite the axis side; wherein the grate is further defined by a second lateral surface, and a first lateral surface opposite the second lateral surface, the first lateral surface further comprising a raised mounting portion wherein at least one mounting bore extends into and through the body of the raised mounting portion, a plurality of throughput apertures extending through said grate from the top surface to the bottom surface and, a grate holder, including a top surface and a pulp lifter contact surface, opposite the top surface, the grate holder being defined by an axial end, and a circumferential end opposite the axial end, an anchor bore of predetermined transverse size extending from the top surfa

Abstract: A segmented liner assembly and liner segment fastening system is disclosed for the rotatable shell of an ore grinding machine, the shell having a plurality of mounting bores formed therethrough. The liner assembly consists of a plurality of liner segments each of which has one mounting bore that extends into the body of the segment from its mounting surface and a mounting recess having a transverse size greater than that of the mounting bore which extends from the mounting bore to the grinding surface. A threaded member extends through a mounting bore of the shell and an aligned mounting bore of the segment into the recess of the segment and externally of the shell. The threaded member is screwed into a nut that is seated at the base of the mounting recess. In a first embodiment, the threaded member has an integrally formed wrenching head enabling the threaded member to be rotated and screwed into the nut, thus drawing the liner segment tightly against the inner surface of the shell.