The KJ421 hydraulic tunneling drilling rig is qualified for the drilling of tunnels whose section falls in the range of 16-68 square meters. It is capable of drilling blast holes and rock bolting in a vertical, inclined and horizontal orientations.
The drill rig is fitted with a flexible boom in two symmetric rectangular coordinates, without any operation blind spots. 360° rotation and self-leveling beam make drill positioning extremely easy. It can also be used for the drilling of lateral cross-cut and rock bolting.
The drilling rig provides a good view for the operator; balanced layout and the articulated chassis of four-wheel drive ensure the flexible, fast and safe driving in the narrow tunnel.
The stepped piston is used for the high-frequency impacting rock drill and this can improve the transmission efficiency of impact and drilling speed and reduce the consumption of drilling tools.
Considerable space and automatic functions enable the driver to concentrate on drilling in a safe, fast and accurate manner;
All the relevant parts are protected and maintenance is easy.