The new Wirtgen 280 SM(i) is a high-performance surface miner designed for reliable and selective extraction of primary resources by direct loading, sidecasting or cut-to-ground. Raw materials are extracted and crushed in situ in purest quality in a single operation – without drilling and blasting, and with minimal environmental impact.
The 280 SM(i) is driven by four steerable and height-adjustable crawler units. This 120-t-class machine is highly manoeuvrable and can be quickly turned at the end of a cut. The Level Pro Active automatic levelling system maintains the specified cutting depth with consistently high precision and without further aids.
The 2,750 mm cutting drum unit with a cutting depth of up to 650 mm is precisely adaptable to each specific application and achieves outstanding cutting performance with minimal pick wear. Wear-resistant toolholder systems ensure optimal pick utilisation and minimal downtimes. The soft rock cutting drum unit is designed especially for high material flows in soft rocks. In contrast, the hard rock cutting drum unit ensures maximum durability and long life in hard rocks.
The high-performance, hydraulically height-adjustable, rear discharge conveyor with a movable counterweight can be slewed to the right and left by 90° and enables the loading of mining trucks with payloads of up to 100 t. What’s more, the operator can continuously vary the speed of the belt independent of the engine speed to reduce belt wear dependent on the material volume and the piece-size of the mined material.
The 280 SM(i) is also equipped with a dust-sealed and air-conditioned positive-pressure cabin with fresh air filtration, which effectively prevents the ingress of dust into the operator’s workplace. Mounted on the front left chassis column, the operator’s cabin with all-round glazing is decoupled from the machine body and can be rotated by 90° in both directions. Up to six cameras can be installed to provide even better all-round vision.
Various automatic functions further contribute to the operator’s comfort, reduce the risk of fatigue, assist the operator in the achievement of high productivity rates and make the overall process more efficient.
In addition, the new 280 SM(i) is environment-friendly, thanks to the reduction of carbon emissions by low specific fuel consumption, an efficient water management system and effective solutions for the minimisation of dust pollution.
Note: The new Wirtgen 280 SM(i) surface miner will be showcased at bauma 2022.
Bauma booth: FS.1011