HDD class: 8 - 10 tons, pit launch machine

		TERRA-JET 3008 E Spülbohrungen aus der Grube

The king of the pit launched machines - The TERRA-JET TJ 3008 E

    The TERRA-JET 3008 E was developed in close co-operation with the Swiss HDD contractor Schenk AG from Heldswil. This development took nearly 2 years. The customer’s essential requirements was that the machine should not be longer than 2.50 m (8.25 ft) or wider than 0.90 m (3 ft) and accommodate drill rod lengths of 1.50 m (5 ft).

    The results are promising. The TERRA-JET 3008 E provides HDD bores in lengths up to 150 m (500 ft) and backream diameters up to 420 mm/16.5” (depending on ground conditions). The bores may have curves with a minimum bending radius of R = 24 m.

    The high torque of 3’000 Nm and the high thrust and pullback forces of 80 kN (8 tons) are unique. It allows HDD bores in hard ground. As a standard with all TERRA-JETs, the TERRA-JET 3008 E is equipped with the ADBS. This unique drilling and backreaming system adjusts the working speed automatically to the ground conditions within milliseconds.

The king of the pit launched machines - The TERRA-JET TJ 3008 E
The king of the pit launched machines - The TERRA-JET TJ 3008 E

Pit and surface launched machine

    The TERRA-JET 3008 E can be pit or surface launched. This HDD system has a modular design. Its main components are the pit frame, the hydraulic power pack and the mixing+pumping station.
    With its 2 separated hydraulic circuits for thrust and rotation, the TERRA-JET 3008 E can operate simultaneously at maximum torque and maximum thrust or pullback force. The hydro-chain-drive has the highest efficiency rate, low wear and is dirt resistant. Due to the movable break-apart-system.

Perkins Power Pack

    The Perkins Powered 3008 E drives the pit frame and the mixing+pumping station. As an option, it can be equipped with a Diesel particulate filter (DPF), which fulfils the strictest anti-pollution norms.

Perkins Power Pack
Perkins Power Pack

Telescopic Rubber Crawler

    The optional telescopic rubber crawler can extend its width from 0.80 – 1.20 m (2.65-4 ft). Its drive and break components are strong enough to climb stairs with 100 % inclination even with the assembled TJ 3008 E. This mobility allows bores even from cellars.

Telescopic Rubber Crawler
Telescopic Rubber Crawler


    The TERRA-JET 3008 E is equipped with a second generation Automatic Drilling and Backreaming System (ADBS).

    This patented system automatically and within milliseconds adjusts the working speed of the drill to suite the ground conditions. In soft ground the drill operates at maximum speed, in hard ground slowly, but always at the optimum speed.

    This allows the operator to operate the drill at maximum efficiency in a controlled and relaxed manner and prevents the drill rods and drilling tools from being overloaded. During the pilot bore the ADBS controls the thrust force. If the drill head hits an unexpected obstacle, the ADBS stops the drilling speed immediately and drills very slowly through the obstacle. All automatically!


Technical Data

Technical Data

*   Depending on ground conditions
** Depending on drill rod size
Technical specifications can be changed without previous notice.
pushing force at 190 bar
pulling force at 190 bar
max. oil pressure
ideal oil volume
pullback force
8 to (80 kN)
17'600 ft.lbs (9 US tons)
thrust force
8 to (80 kN)
17'600 ft.lbs (9 US tons)
driving power
44 kW (60 PS)
44 kW (60 HP)
torque, 1st speed
3'000 Nm
1'92 ft.lbs0
drill rod rotation speed, 1st speed
0 - 63 U/min
0 - 63 rpm
drill rod rotation speed, 2nd speed
drilling fluid volume
100 l/min
26 gpm
maximum drilling fluid pressure
70 bar
1000 psi
drilling speed - quick gear
14 m/min
46 ft/min
14 m/min
46 ft/min
drilling speed - at full load
14 m/min
46 ft/min
noise emission in 7 m distance
noise emission at operators ear
pilot bore diameter
ø 60 - 100 mm
Ø 2.4" - 4"
maximum backream diameter*
ø 420 mm
ø 16.5"
maximum drilling length *
150 m
500 ft
drill rods, length
1.5 m
5 ft
drill rods, diameter
ø 57 / 54 mm
ø 2.25 / 2.12 "
minimum turning radius**
24 m
80 ft
Dimensions pit cradle LxWxH
2.5 x 0.90 x 1.25 m
8.25 x 3.0 x 4.1 ft
dimensions hydraulic power pack LxWxH
1.95 x 0.94 x 1.75 m
6.5 x 3.1 x 5.78 ft
dimensions Mixing and Pumping Station LxWxH
1.45 x 0.75 x 1.0 m
4.8 x 2.5 x 3.3 ft
weight of the pit cradle
1'200 kg
2'640 lbs
weight of hydraulic power pack
900 kg
1980 lbs
weight of Mixing and Pumping Station
205 kg
451 lbs


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