DD421 Development drill rig

Sandvik DD421 Development Drill Rig

Sandvik DD421 is a two-boom, electro-hydraulic mining development drill rig engineered for fast and accurate drilling in drifting and tunneling of 8-60-square-meter cross sections. This mining jumbo offers an improved hydraulic control system with new features that enable accurate drilling performance with efficient control. Well-designed, robust structures and proven components ensure a reliable workplace for both operators and maintenance crews.


  • FOPS/ROPS-approved canopy for increased operator safety
  • Agile carrier allows for tramming into small tunnels
  • Compact drill module offers multi-directional drilling capabilities in low heading tunnels
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