220 SM(i): Economical, safe, selective. The WIRTGEN Surface Miner 220 SM(i) is the new specialist for raw material extraction using the windrowing process. It is ideal for use in small to medium-sized mining operations. Routing work? No problem! High productivity at low operating costs is its hallmark. Drilling and blasting? Superfluous! WIRTGEN surface miners have proven their value worldwide for decades. Take advantage of innovative solutions from the technology leader.