The YX-420T-1/420TF/425-1/430-1 open-air DTH drill rig is a new equipment upgraded in response to the country's environmental protection requirements. Equipped with Yuchai's four-cylinder National III engine to meet the country's requirements for emissions and environmental protection.

Adopting plunger walking motor, engineering four-wheel area, increase working pressure and increase climbing performance. Increase the pitch and boom cylinders to meet the requirements of extreme positions. At the same time, the hydraulic system is upgraded to increase the system flow and increase the rotation speed. Optimize the lifting cylinder to improve reliability. The guide rail adopts inclined installation, which is convenient for operation and observation. The cover adopts thicker profiles and adds hoisting rings, which is convenient for loading, unloading and hoisting. The YX-420T-1/420TF/425-1/430-1 type adds a dust collector and adopts double dust catching cylinders, which is more environmentally friendly and reliable when working.