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The HD99 is the most powerful earthdrill in the Ground Hog line. With it's 9hp Honda engine, the HD99 can easily dig with any Ground Hog auger up to 18 inches in diameter. The use of hydraulics allows the HD99 to have variable auger speed and reverse which is very useful if the auger gets stuck.
Available with a 6 or 9 Inch auger bit
The HD99 is designed to take the load off of the operator by being almost perfectly balanced with an 8-inch auger attached, and the right angle design eliminates torque to the operator. There are also 3 handlebar positions that allow for normal drilling, as well as close up drilling next to an obstacle such as a wall or fence. The drilling head also pivots from side to side for drilling on uneven terrain. Large tires make the HD99 easy to maneuver around the job site and there is a locking mechanism on the digging head that allows the auger to be held up and out of the way for moving the machine around the job without having to disconnect the auger.
| Auger Speed | 140 rpm @ 3600 engine rpm (no load) |
| Auger Torque | 275 ft. lbs. torque (approximate) |
| Maximum Depth | Depends on length of Auger |
| Weight | 295 lbs. (134 kg) (with fluids) |
| Length | Normal Drilling 100 inches(253 cm) |
| Length | Close-up Drilling 75 inches (190 cm) |
| Width | 34 inches (86 cm) |
| Height | 38 inches (96 cm) |
