The large above ground electric mining shovel converted from steel slows the 25,000-lb. dipper door from opening and closing too fast. A full dipper load on the door is 227,000 lbs. Codesigned between the OEM P&H Mining and Spokane Steel Foundry, the cast part resulted in a 40% reduction in machining time, a 15% reduction in weight and a per unit savings of 46% ($81,178 annually).
