1, Brief Introduction:XD-516 is configured with a powerful dual-motor driven rotary head and its rotary torque can reach 3500N.m,and its rotary speed is adjustable combined with a multi-way regulating valve.XD-516 meets the requirement to drill diameter of 76-300mm 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 XD-516 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.(1) XD-516 DTH drilling rig equipped with double cycloidal hydraulic motor driven rotary head, large torque, fast rotation speed which can meet the requirements of drilling hole diameter of 76-300mm,0-30m depth. (2) The XD-516 DTH drilling machine standard configured with construction crawler and piston hydraulic motor driven, which contributed stronger traction force, more stable and reliable, capable to the complex geological and difficulty terrains of open-pit mines. (3) Centralized ergonomic control console for easy operation, increased drilling efficiency, increased operational safety and comfort. (4) Equipped with own developed dry dust collection system for high efficiency& more eco-friendly.