The DD-440T is the only track-mounted drill that offers the highest range of thrust/pullback power. The Wiggle Steer® System provides the operator of a directional drill the means to rotate the drill pipe and subsequently the cutting head on the drill string back and forth over a predetermined range. This back and forth motion would cause the hole made by the cutting head to be more open in a particular direction and therefore facilitate steering of the drilling pipe in that direction under ground.
Specs
| Rating | 600 HP (441.3 kW) |
| Maximum Thrust/Pullback | 440,000 lbs. (200 Tonnes) |
| Drill Pipe | Range II – 34 ft. (10.4 m) |
| Maximum Rotary Torque | 60,000 ft-lbs. (81,350 Nm) @ 0 – 25 RPM |
| Maximum Breakout Torque | 154,000 ft-lbs. (209,500 Nm) |
| Maximum Makeup Torque | 101,700 ft-lbs. (137,900 Nm) |
