Grade Steering System

HEMI grade steering systems are used in grade only applications where line may not be so critical. Like line and grade system, the patented design features bearings in the steering hinges and the torque multipliers to add durability and robustness. The grade is monitored by using a water level and any corrections are made by turning the steering rod from the pit. To facilitate easier turning, a torque multiplier is used behind the steering knuckle. This reduces the effort required to turn by four times. Depending upon several factors such as size of the casing, type of soil, presence of ground water, and the amount of bentonite lubrication used it may be possible to steer the pipe without a torque multiplier for up to 150 ft. However, the effort required to turn the steering rods is greatly reduced using a torque multiplier. It is routinely possible to turn the steering head using a simple pipe wrench at distances exceeding 500 ft. Typical components of this system are shown in the schematic below.