DT621

TUNNELING DRILLS
TECHNICAL SPECIFICATION

Sandvik DT621 is a compact two-boom jumbo for KEY FEATURES

demanding conditions and multiple applications. The Coverage area 49 m²
jumbo is capable of face drilling, cross-cut drilling and Hydraulic rock drills 2 x RD520, 20 kW
bolt hole drilling. Drilling feeds 2 x TF512, 12 - 16 ft
Booms 2 x SB40
The drill rig various options make it suitable for a range Control system 2 x THC561
of conditions and tasks. The proven and robust SB40 Hole length Up to 4 660 mm
boom provides coverage of 49 m². A selection of fixed Drift size class (H x W) 4 000 x 4 000 mm
and telescopic feeds are available for a variety of Turning width (T-section) 3 500 mm
applications. Transport width 2 150 mm
Transport height 2 350 mm / 3 200 mm
The new rock drill RD520 provides smooth and efficient Transport length 12 350 mm
drilling. Total weight 22 000 kg depending on options
Sandvik DT621 offers a best serviceability and usability.

1. SANDVIK DT621 - TUNNELING DRILL

HYDRAULIC ROCK DRILL ELECTRIC SYSTEM
Type of rock drill RD520 (TS2-235) Standard voltage 380 - 690 V (± 10%)
Percussion power 20 kW Total installed power 135 kW
Percussion pressure Max. 220 bar Main switch gear MSE 20
Percussion rate 74 Hz IP classification Specification TS2-132
Stabilizer Hydraulic Starting method Star delta 380 V - 690 V
Rotation speed Max. 400 rpm (with OMS80) Soft starter 575 V
Rotation torque 400 Nm (with OMS80) Automatic cable reel TCR3E with spooling system
Hole size (drifting) 43 - 64 mm Operator station and remote
Cable reel control
Hole size (cut hole) 76 - 127 mm control at rear machine

T38 - R32 - H35 Batteries 2 x 12 V, 145 Ah

Recommended rod
T38 - R35 - R39 Front lights
6 x 50 W LED (4 200 lm, 6 000 K)
Shank adapter (male) T38 (combined working and driving)

Weight 225 kg Rear lights

4 x 50 W LED (4 200 lm, 6 000 K)
Length 1 010 mm (combined working and driving)

Profile height 90 mm Parking rear brake / park lights 2 x Red LED

Stair and service light LED (24 V)
DRILLING FEED
Type of feed TF500-12’ TF500-14’ TF500-16’ AIR AND WATER SYSTEM
Feed force Max. 25 kN Max. 25 kN Max. 25 kN Flushing of holes By water
Total length 5 270 mm 5 880 mm 6 490 mm Water booster pump WBP2
Hole length 3 440 mm 4 050 mm 4 660 mm Water pump capacity 100 l/min
Rod length 3 700 mm 4 305 mm 4 915 mm Water pump inlet pressure 2 bar (Min.)
Net weight 500 kg 530 kg 560 kg Flushing water pressure 10 - 15 bar
Shank lubrication device SLU2 (air / oil mist)
BOOM Rock drill oil consumption 180 - 250 g/h
Type of boom SB40 (TS2-231) Rock dril air consumption 250 - 350 l/min
Parallel coverage 44.5 m² Air compressor CTN10, 1 m³/min (7 bar)
Parallelism Automatic hydraulic
Boom extension 1 050 mm OPERATOR’S SAFETY CANOPY
Feed extension 1 350 mm Canopy certification FOPS (ISO 3449)
Boom weight, net 2 100 kg Unit height in tramming 3 200 mm
Roll-over angle 358° Operation Standing drilling, seated tramming
For tramming
Operator’s seat
HYDRAULIC SYSTEM Adjustable with seat belt
Powerpack HPP555 (2 x 55 kW) Sound pressure level EN 791 Operator station: 100 dB(A)
Filtration (pressure / return) 20 µ / 10 µ
Oil tank volume 270 liters (drilling)
Oil tank filling pump Electric
Cooler for hydraulic oil OW30 oil-to-water (2 x 30 kW)

DRILLING CONTROL SYSTEM

Type of control system THC561 (5-1020)
Operating principle Hydraulic control

Direct control
Manual boom control Fully proportional
Hydraulic parallelism

Feed / percussion control

Drilling control
Flushing control
Automatic cycle Stop and return automatics

2. SANDVIK DT621 - TUNNELING DRILL

CARRIER OPTIONAL FEATURES AND PACKAGES
Type of carrier NC7 (frame-steered) Electric system
Carrier articulation ± 40° *Optional voltage 1 000 V (50 or 60 Hz) with Direct-
Rear axle oscillation ± 10° On-Line starter
*Electric cables Specification TS2-121
Ground clearance 320 mm Ground fault and overcurrent VYK
Diesel engine MB OM904LA, 110 kW, Tier 3, Stage IIIA protection
Exhaust catalyzer Standard Auxiliary outlet 1 x 110 V or 1 x 230 V, 16 A
Dewatering pump outlet readi- Site voltage 380 - 690 V (Max. 8 kW)
Transmission Hydrodynamic, Spicer T20 000 ness
Axles Spicer Amber flashing light LED (24 V)
Tires 12.00-20 Battery jump start Option

Service brakes SAHR type, fail save wet disc brakes Air and water system
Parking and Air mist flushing kit IP5 air cleaner and flow control
SAHR type, fail save wet disc brakes Flushing flow control 2 booms
emergency brakes
*End of hole air flushing Including CT28 air compressor
16 km/h (Horizontal) Water hose reel with water hose THR2.5E with 38 mm (1 ½”), 65 m
Tramming speed
6 km/h (14%=1:7=8°) Compressed air outlet Quick coupling
Gradeability / sideways tilt Max. 15° / 5° Cleaning system
For 10 - 16 ft rods and two shank LP system with reel Up to 15 bar
Rod rack on carrier side HP system with reel Up to 180 bar
adapters
Fuel tank 140 liters
Greasing systems
2 x Vertical (front) Manual system Greasing unit with pump, reel and
Hydraulic jacks
2 x Vertical (rear) nozzle (5-2110)
Automatic system Carrier and booms
Centralized greasing points Specification 5-2110
Hand held fire extinguisher 1 x 7.7 or 9 kg (type ABC) Operator’s safety cabin /
Tramming alarm Standard canopy
*Safety cabin FOPS / ROPS (ISO 3449 / 3471)
Colour scheme Sandvik
incl. air conditioning
2 x Operator’s manual *Stainless steel cabin FOPS (ISO 3449)
2 x Maintenance manual Cabin heating During tramming and drilling
Documentation 2 x Technical manual (in English only) Cabin audio system CD player / radio / MP3 with loud-
2 x Parts manual (in English only) speakers and 12 V outlet
1 x Toolman CD Boot washer At each access
Front screen protection grill For cabin or canopy
OPTIONAL FEATURES AND PACKAGES
Fire suppression system
Rock drill Spare hand held extinguisher 1 or 2 x 7.7 or 9 kg (type ABC)
*Type of rock drill HLX5 instead of RD520 Manual system Ansul, 6 nozzles
Automatic system Ansul, 6 nozzles
Drilling feed
*Feed length 14’, 16’ Carrier
*Telescopic feed TFX6/12, TFX8/14 Reduced tramming speed 3 rd gear lockout
Rod retainer TRR1 incl. safety wire, *Diesel engine QSB4.5, 119 kW, tier 4i, Stage IIIB
add 35 mm length of the feed *Foam filled tires 4 pcs
Two rods system TRS included TRR1 with safety wire. Fast filling and evacuation Wiggins (complete)
system
Boom
Wheel chocks and holders 2 Sets
*Type of boom SB40NV instead of SB40
Tramming camera Rear and side
Rod rack On carrier side
Hydraulic system
*Oil tank filling pump Manual
Extra items
Cooler for hydraulic oil OA30 oil-to-air (2 x 30 kW)
Spare rock drill RD520 OR HLX5
Vacuum pump For hydraulic system
Spare wheel assembly 12.00-20 or foam filled tire
Special tools for rock drill
Drilling control system Documentation Extra paper, CAT-base, Link-one
Constant speed drilling Replaces feed / percussion control manuals
Instrumentation TMS+ D2 for TFX-feed Package: Country specific LAM, USC, EUR, Turkey
TMS+ DDSS2 for TF-feed options
TCAD+ with iSURE I-II design and *Package: Harsh water Basic or advanced (Spec. TS2-049)
reporting.
Access detector Mandatory in Europe (TS2-211) *) replaces standard feature

3. SANDVIK DT621 - TUNNELING DRILL

 1 500 3 990

6 060

1 870

2 150 200
8 200

TS2-286:01/ENG/METRIC © Sandvik Mining and Rock Technology 2017 SANDVIK is a registered trademark owned by Sandvik Intellectual Property AB in Sweden and other countries.
8 820 All dimensions in mm

TF512 TF514 TF516

Overall length mm 12 350 12 550 13 000

DT621

3 200
2 350

15° 18°
320
2 840 3 175 1 060
Total length

2 950
DT621

15° 18°
All dimensions in mm

10°

Drilling feed Radius (R) T-cross (C)

TF500–12’ 6 300 mm 3 700 mm C
5° R
TF500–14’ 6 450 mm 3 850 mm
TF500–16’ 6 600 mm 4 000 mm
750

3 200
35°
750

All dimensions in mm

Sandvik Mining and Rock Technology reserves the right to make changes to the information on this data sheet without prior notification to users.
Please contact a Sandvik representative for clarification on specifications and options.

SANDVIK.COM

4. SANDVIK DT621 - TUNNELING DRILL