ERW Engineering Pty. Ltd. is the appointed agent for MUBEA Disc Springs (Belleville Washers) and Ball Bearings and Guede Grid Shaped Surface Washers here in Australia and New Zealand. ERW Engineering, Mubea and Guede are supporting the Engineering Trade by providing these products with the necessary information and calculations needed to optimize the efficiency of the products. The excavating equipment comes from several sources depending on the brand of the machinery.