The HFJ37 fully automatic crawler down-the-hole drilling rig has lower footage costs and a more user-friendly design. The diesel engine hydraulic oil pump unit is used as the power unit, and the hydraulic motor realizes auxiliary actions such as rotation, propulsion, lifting, walking and hydraulic cylinder swing angle positioning of the drilling rig. When the HFJ37 drilling rig is drilling, only the down-the-hole impactor consumes compressed air. Compared with the all-pneumatic drilling rig, the exhaust capacity of the supporting air compressor is reduced by 30%-50%, and the energy (fuel or electricity) consumption during drilling operations is about 40%-50%.

It is mainly used for drilling and blasting holes in hydropower projects, open-pit mining, road construction, and national defense projects.