Zhigao ZGYX-416 is configured with a powerful dual- motor driven rotary head and its rotary torque can reach 1, 950N.m, and its rotary speed is adjustable combined with a multi-way regulating valve. ZGXY-416 meets the requirement to drill diameter of 130mm hole with 76mm drill pipe. Rotation speed is up to 150rpm which satisfying the needs of some customers for high-speed drilling of soft rock formations. Also ZGXY-416 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.