Sandvik MT720 Tunneling Roadheader. The MT720 is the largest tunneling roadheader in the range, topping the scales at 135 ton. The boom movement allows for a cutting envelope of 6.6 metres high and 9.1 metres wide with a chain driven conveyor capable of transferring 400 cubic metres of material per hour.
Sandvik MT520 PLC-controlled roadheader has been designed for use in tunneling, as well as salt, potash and chalk mining with a maximum profile up to 70 m². It has a modular design that offers more flexibility than standard roadheaders and works in most rock conditions up to 100 MPa compressive strength.