Features: 
 ? Applies of mining and rock operations engineering, multi-directional blast hole drilling medium hard or hard rock. 
 ? Using special valveless gas distribution agencies and high-efficiency rotary reduction gear. 
 ? Installed muffler device and a rotary drive air motor and its reasonable configuration. 
 ? Machine with drill frame FJY25A type. 
 Related parameters: 
 Name rail drilling machine 
 Model YG40 
 Weight (kg) 36 
 The impact of air consumption (L / s) ≤ 117 
 Bore diameter (mm) Φ45-55 
 Bore depth (m) 15 
 Shank Size (mm) R32 
 Working pressure (MPa) 0.63 
 Supporting parts FJZ25A of