The big Wirtgen 4200 SM Surface Miner is designed to cut coal and soft to medium-hard rock with mechanically driven cutting drum, and two-part loading conveyor.

Its rigid, welded honeycomb design has integrated tanks for diesel fuel, hydraulic fluid and water. Its four crawler tracks are free-floating and connected to supporting arms which are linked to the frame via a moving parallelogram made up to two strut constructions in each case. The tracks are fitted with double grouser track shoes.

Cutting depth control is adjusted via hydraulic cylinders, while the rear crawler suspensions are controlled via an automatic cutting depth control unit.

The conveyor system is composed of a wide primary belt which picks up the cut and reduced material at the cutting drum, and a loading conveyor to discharge the material into haul trucks. The loading conveyor can be adjusted in height and slewed to either side. The conveyor speed is variable.

Cutting Width 13.8 feet (4,200 mm) Cutting Depth 0-2.6 feet (0-800 mm) Engine Output 1.194 kW / 1.623 PS Operating Weight 422,000 lbs. (191,400 kg) Number of Crawlers 4 Cutting Drum Drive Mechanical Travel Drive System Hydraulic, All-Crawler