IMPROVED DISC CUTTER AND EXCAVATION EQUIPMENT

摘要

A disc type rolling rock cutter (120), and cutter-heads (420) employing such cutters. A rock cutter (120) with compact bearing (130), and a smooth, rounded blade shape is disclosed. The design incorporates a cutter ring (128), bearing assembly (130), and seal assembly (136). The simplified assembly is achieved by using a comparatively large cutter shaft (122) which is normally in the range of 30-50 % of the ring diameter. The shaft design is sufficiently robust to permit a cantilever mount of the cutter (120). Also, a method of shaping and installing hard metal inserts (302) improves cutting efficiency over the life of the cutter, and increases wear life in highly abrasive conditions.