DU421 Articulated in-the-hole production drill rig

Sandvik DU421 is a center-articulated, carrier-mounted, in-the-hole (ITH) drill rig engineered for high mobility in underground mining. The rig is equipped with ITH hammers powered by on-board, high-pressure screw boosters suitable for drilling holes with a diameter of 89 to 216 millimeters (3 ½ to 8 ½ inches) to depths of more than 100 meters (330 feet).


  • Temperature-controlled FOPS/ROPS operator cabin ensures safety and comfort
  • On-board reciprocating booster increases productivity and mobility
  • Different mast and carousel configurations for production drilling or service hole applications offer flexibility
  • High-accuracy in-the-hole drilling delivers enhanced profitability with the lowest cost per ton
Technical data
Engine power 130 kW
Hole diameter 89 - 216 mm
Carrier type Centaur
Control system CanBus, RDC2 operator panel
Engine type Mercedez 904, tier III