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

DT921i Tunneling jumbo

The DT921i is a computer-controlled two-boom electro-hydraulic drilling jumbo for tunneling and cavern excavation of 12-125 m² cross sections, including face drilling, bolt hole drilling, and mechanized long-hole drilling.

Our DTi jumbos are designed with successful operations in mind: they are fast, accurate and user-friendly. Together with the iSURE tunnel management program, intelligent iDATA control system, newly launched high frequency RD525 drills, robust booms and advanced drill string guides, they offer an excavation result of the highest quality with the lowest cost.

To further improve the excavation process, remote access via WLAN can be chosen. This allows web-based data transfer as well as online MWD.
The DTi design also offers ease of service. The components are damage-protected, and all daily service points are accessible from the ground level.

Features and benefits:

  • Advanced, user-friendly iDATA control system
  • Full-round drilling automatics
  • Sensitive drilling controls
  • Finetune features:
  • Lock-to-target: Helps finding the hole position quickly and accurately
  • QuickStep: Finetunes drilling progress steps during automatic mode
  • Dynamic correct: Redirects drilling during boom movement and helps keeping the hole bottom in place
  • WLAN connection for remote access, web-based data transfer and online MWD*
  • Total station navigation
  • Ergonomically designed work station
  • Excellent visibility
  • Modern, FOPS-certified 3i cabin
  • Built-in self diagnostics system
  • Advanced factory calibration for site use
  • TRH mechanized rod handling system*
  • SCR centralized front retainer*
  • iBOLT systematic bolting*

* Options

Key Specifications
Tunnel size 9 050 - 14 780 mm / 356 - 582 in
Coverage area 12 - 125 m² / 129 - 1 345 ft²
Hole diameter 43 - 64 mm / 1 ¾ - 2 ½"
Hole length Up to 6 085 mm
Rock drill RD525, 25 kW (33.5 hp)
Control system iDATA
Boom 2 x SB100i
Elevating boom support NO
Feed 2 x TF5i, 12 - 21 ft
Length 15 400 mm / 50.5 ft (with default feed)

Width

3 250 mm / 10.7 ft (drilling)

2 580 mm / 8.5 ft (tramming)

2 580 mm / 8.5 ft (transportation)

Height

3 530 mm / 11.6 ft (drilling)

3 570 mm / 11.7 ft (tramming)

Weight (depending on options)

29 000 kg / 63 934 lbs (basic)

33 000 kg / 72 752 lbs (with utility boom)

Article functions

Contact us