Sandvik Construction provides solutions for construction industries in niches such as quarrying, tunneling, demolition, dimensional stone, recycling and civil engineering.

DT821 Tunneling jumbo

Sandvik DT821 series includes three different models (DT821, DT821-C and DT821-SC) of two-boom electrohydraulic jumbos for fast and accurate tunneling and cavern excavation of 12 - 110 m². The DT821 jumbos are equipped with hydraulic or electronic drilling systems, with added automatic functions and comprehensive choices for instrumentation level. They are available in both cabin and safety canopy versions. Sandvik DT821 jumbos can be used for face drilling, cross-cutting and bolt hole drilling.

Features and benefits:

  • Built-in diagnostics to minimize maintenance time
  • RD5 series rock drills for optimized drilling performance
  • Booms with large, optimally shaped coverage and full automatic parallelism
  • Powerful 4-wheel-drive wheel steered carrier for rapid and well-balanced tramming
  • Utility boom available as option
  • Noise and vibration insulated FOPS-certifed cabin with excellent visibility and ergonomics (C and SC models)
  • Sandvik iSURE tunnel and underground excavation management tool available with TCAD/TLOG** instrumentation/data collection option
Key Specifications
Tunnel size 8 420 - 14 210 mm / 331.5 - 559.5 in
Coverage area 12 - 110 m² / 129 - 1 184 ft²
Hole diameter 43 - 64 mm / 1 ¾ - 2 ½"
Hole length Up to 6 180 mm
Rock drill

RD520, 20 kW / 27 hp (DT821, DT821-C)

RD525, 25 kW / 33.5 hp (DT821-SC)


Control system

Hydraulic THC 561 (DT821, DT821-C)

Electronic TPC 561 (DT821-SC)


Boom 2 x SB90
Elevating boom support NO
Feed TF500, 16 ft
Length 14 930 mm / 49 ft (with default feed)

Width (DT821)

3 000 mm / 10 ft (drilling)

3 000 mm / 10 ft (tramming)

2 500 mm / 8 ft (transportation)

Height (DT821)

3 600 mm / 11.8 ft (drilling)

2 750 mm / 9 ft (tramming)

Weight (DT821, depending on options)

26 500 kg / 58 422 lbs (basic)

28 900 kg / 63 714 lbs (with utility boom)

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