TERRA-JET DJ 20

HDD class: 8 - 10 tons

		Spülbohrung mit der Bohranlage Spülbohranlage TERRA-JET 2808 S, Mischanlage an Bord

One of the most productive 9 tonnes HDD drill rigs in its class - the DJ 20

    Powered by a proven 75 HP strong HATZ Diesel engine (Stage 5) the TERRA-JET DJ 20 offers up to 9 tons of thrust and pullback force, 2.840 Nm of torque and a maximum spindle speed of 228 rpm. The small footprint and the reduced noise level at the operator’s ear make the TERRA-JET DJ 20 user friendly and sustainable. The fast set up time and the increased movability helps you to operate your machine also in urban areas or family‘s backyard. It is the perfect machine to complete your HDD drill rig fleet in the 8-10 tonnes class.

One of the most productive 9 tonnes HDD drill rigs in its class - the DJ 20
One of the most productive 9 tonnes HDD drill rigs in its class - the DJ 20


Superb operators cabin

    Intelligent features like the thrust boring, the carve mode and the cruise control make drilling and steering very easy, also in hard ground conditions. The operator sits on a superb cabin. The cabin can be turned in 22.5 degrees steps from the driving position to the 90 degrees position. All control components will turn with the cabin. The operator chooses his optimum position.



Superb operators cabin
Superb operators cabin


Rack and Pinion Drive

    THRUST and PULLBACK of the driving saddle are carried out via Rack and Pinion Drive. This is reliable and powerful. Three hydraulic motors with gear boxes move the driving saddle. In the quick gear they reach 17 m/min (56 ft/min). The two rotation motors of the driving saddle create the high torque.

Rack and Pinion Drive
Rack and Pinion Drive


Intelligent drilling assistant systems

    Intelligent drilling assistant systems like the thrust mode, carve mode, the ADBSe or the drill speed control make the drilling more efficient and more easy. The operator can relax, the machine does the work. The electronical CLP control manages all drilling assistant systems and feels the underground. Like this the machine operates at highest productivity.

Intelligent drilling assistant systems
Intelligent drilling assistant systems


Compact and powerful

    With its compact design and increased movability the DJ 20 can drive through a 1.60 m wide entrance. The machine is steered by a remote control, fast and safely.

Compact and powerful
Compact and powerful


Galvanized drill rod magazin, high quality drill rods

    All HDD drill rigs from TERRA have a galvanized drill rod magazine. Optional TERRA even overs a duplex painting. Different than some competitors the Swiss manufacturer TERRA produces all parts in Europe to guarantee highest Quality standards. This ensures a long lifetime of your drill rig.

    The drill rods of the TERRA-JET DJ 20 are 3.0 meters long which means less drill rod changing and faster operation. With a bending radius of 35 m you can easily steer around existing pipes in the ground. The magazine is equipped with 120 m of drill rods.

Galvanized drill rod magazin, high quality drill rods
Galvanized drill rod magazin, high quality drill rods


Service friendly

    The S-Series is designed to be extremely service friendly and reliable. All hydraulic components are easily accessible for servicing. The engine cover is made of glass fibre reinforced plastic (GRP) and can be lifted up to 45°, supported by gas-filled struts. They can also be lifted off completely allowing the best access to all components. The electric components are assembled in the central control panel inside of the cabin with easy access.

Service friendly
Service friendly


Break-apart System

    The break-apart system allows the hydraulic break-apart of the drill rod threads. The break-apart torque of 5’100 Nm (3800 ft.lbs) is nearly twice as high as the torque of the driving saddle. The clamping force is 100 kN (10 tons, 22'000 lbs). This guaranties that the drill rod threads can be always opened reliably.

Break-apart System
Break-apart System


Fluid Rock Drilling

    The TERRA-JET DJ 20 can be equipped with a Fluid Rock Drilling Air Percussion Head. With this rock drilling tool you can even drill in hard rock or mixed ground conditions.

Fluid Rock Drilling
Fluid Rock Drilling


Vertical drill

    The TERRA-JET DJ 20 can be adapted with a vertical drill option.


 

Technical Data

Technical Data

*   Depending on ground conditions
** Depending on drill rod size
Technical specifications can be changed without previous notice.
Pullback force
87 kN (9 to)
19’100 lbs
Thrust force
87 kN (9 to)
19’100 lbs
Engine power
Hatz 55 kW (75 PS)
Hatz 55 kW (75 HP)
Torque, 1st speed
2'840 Nm
2’100 ft.lbs
Torque, 2nd speed
1'420 Nm
1’050 ft.lbs
Drill rod rotation speed, 2nd speed
228 U/min
228 rpm
Drill rod rotation speed, 1st speed
80 U/min
80 rpm
Drilling fluid volume - Pilot bore
50 ltr/min @ 70 bar
18 gpm @ 1000 psi
Drilling fluid - Backreaming
100 ltr/min @ 35 bar
26 gpm @ 500 psi
drilling speed - quick gear
27 m/min
89 ft/min
drilling speed - at full load
7 m/min
23 ft/min
pullback speed - quick gear
27 m/min
89 ft/min
pullback speed - at full load
7 m/min
23 ft/min
Guaranteed sound power level Lwa
104 dB(A)
104 dB(A)
noise emission at operator’s ear - without cabin
85 dB(A)
85 dB(A)
Ø of the pilot bore
60 – 100 mm
2.5” - 4”
Maximum backream diameter*
Ø 420 mm
ø 17"
Maximum drilling length*
150 m
500 ft
Drill rods, length
3.05 m
10 ft
Drill rod, diameter
60/54 mm
2.36“/2.12“
Minimum turning radius **
35 m
115 ft
Dimensions L x W x H without cabin
6.00 x 1.50 x 2.50 m
19.5 ft x 4.95 ft x 8.25 ft
weight without cabin with 30 drill rods, ø 55 mm
6.2 to
13’600 lbs


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TERRA AG für Tiefbautechnik - Hauptstrasse 92 - 6260 Reiden - Schweiz - Tel. +41 62 749 10 10 - office@terra-eu.eu