YT28 The rock drill is a kind of high efficiency air leg rock drill machinery. it is mainly used for blasting holes and other drilling works in a quarries, railway construction, water conservancy construction and defence project facility. It is suitable for drilling and blasting under various of rocks at any direction angles.blast hole dia is 34-42mm,drill hole depth is 5 m. this machine may match with Model FT160BD short air leg or Model FT160BC long air leg. This machine has transparent surface of FY200B oil reservoir to regulate oil. Specification Weight ¡à 26 kg Length 661mm Cylinder dia 80mm Piston stroke 60mm Air pressure 0.4- 0.63MPa Impact frequencey ¡à 37 Hz Air consumption ¡Ã81L/S Air pipe (inner dia ) 25mm Water pipe (inner dia ) 13mm Bore dia 34-42mm Shank dimensions(hex¡Ãlength) 22¡Ã108¡Ã1mm¡Ãmm