The part-time driving system is consisted of hydraulic motor, output device, and hydraulic shift structure. It works by equipping an additional driving device to the horizontal directional output system of the drilling machine, and modifying the single-shaft power output into double shaft type. The output mode includes 1st and 2nd gear. Under the 1st gear, the inside and outside drill rod rotates together, and only the inside one will rotate under the 2nd gear. Comparing with traditional single-shaft drill rig, this system has attached a group of power selection mode into its design so it will be more flexible for various applications in construction sites.
The hydraulic shift structure is set before the power system to realize a part-time drive of the inside and outside drill pipe, saving a large amount of cost for modifying the drill rig.

To improve the working efficiency, the inside and outside drill pipe's torque is managed to be the same. This part features easy operation and low failure rate.
Caston offers clients one-stop solution according to the brand and model of clients' drill rig.

The rotating type hydration tank is able to mixes mud into liquid state uniformly in 6-8 minutes. This mixing process will contribute to max mud utilization, saving the construction cost dramatically.

This kind of water seal is a patented device in Caston. It adopts 2 bearings to achieve a high positioning accuracy of the water seal shaft, preventing that the seals are wore more intensely under the radial force. Besides, 2 sealing rings are set inside the combination seal on both sides to block those large particles from entering the system.

The rotary mud supply nozzle for the mud spraying system benefits the system when the drill rig or the targeted point rotates or moves. It is made of wear resistant material and adopts sealing device.

This is an auxiliary device in the HDD construction to hold up the pipelines and reduce the resistance in dragging pipes back. Different specifications are available upon the pipeline weight, diameter and length.

We equip output shaft for clients' drill rig. The main shaft is all direction type, and the flange is of good transmission stability.