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.