Rock Crusher & Screen Repairs / Rebuilds. Specializing in the mining and construction industries, Denver Machine Shop offers crusher and screen repair services. Repairing and rebuilding full machines as well as all components, we utilize a full machine shop, featuring a 120 in. lathe, 4-axis milling up to 90 x 72 in., a 600 ton press, key seater, honing, grinding, and sub-arc welding equipment ...