Abstract: A wear strip (A) for use on material handling equipment, such as chutes, plough blades, scrapers and gates, comprises an elongate body (30) of metal of substantially rectangular cross-section, and wear resistant tiles (31) bonded to the body and extending across one face (32) from at least one edge (33), the tiles being spaced along the body which is provided with slots (34) in alignment with the gaps (36) between the tiles (31), to make it possible to bend the strip (A) to suit the curvature of say a plough blade or a scraper to which the strip can then be "stitch" welded and readily removed (when worn) by a cutting torch or an angle grinder. Other wear strips (B and C) have, respectively, further tiles on an adjacent face, and a cross-section of substantially right-angled triangular form.

Abstract: A rock-boring machine of the type comprising a rotatable headplate having a plurality of disc cutting units mounted on the front face of the headplate. Each disc cutting unit includes an annular rotatable body having a continuous recess extending around its periphery and a plurality of cutting segments located in the recess. The segments are secured in the recess by means of removable clamping means.