YT27 hand held air-leg rock drill is rock drilling equipment with high efficiency. It is widely used in rock drilling. It's very important to coal mine, railway traffic, water conservancy and so on. According to the different of space, it can be used with FY250 grease squirt and FT160A (FT160B,FT160C,FT170) air leg,it also can be fixed on Drill carriage and drilling frame. YT27 Rock Drill 1.Weight:27kg 2.Outside Dimension:668*248*202mm 3.Cylinder Diameter:80mm 4.Piston Stroke:60mm 5.Working Air Pressure:0.63Mpa 6.Consumtion:52~82L/s 7.Impact Frequency:35HZ 8.Impact Energy:¡Ý75.5J 9.Noise:¡Ü125DB 10.Air Pipe inner Dia.:25mm 11.Water Pipe inner Dia.:13mm 12.Bore Dia.:34~45mm 13.Drill Shank Specification:22*108mm/25*108mm