XD-518 is configured with a powerful dual-motor driven rotary head and its rotary torque can reach 4000N.m,and its rotary speed is
adjustable combined with a multi-way regulating valve.XD-518 meets the requirement to drill diameter of 180mm hole with 76mm drill pipe.
Also XD-518 drill with standard crawler and piston hydraulic driven motors contributed the climbing ability stronger, more stable
and more reliable. It’s the highest configuration of its class.