YT28 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 FT160BD short air leg and FT160BC long air leg,it also can be fixed on Drill carriage and drilling frame. YT28 Rock Drill 1.Weight:26kg 2.Length:661mm 3.Cylinder Diameter:80mm 4.Piston Stroke:60mm 5.Working Pressure:0.4~0.63Mpa 6.Impact Frequency:¡Ý35HZ 7.Impact Energy:¡Ý63J 8.Air consumption:58L/s 9.Air Pipe inner Dia:25mm 10.Water Pipe inner Dia:13mm 11.Bore Dia.:34~42mm 12.Drill Shank Specification:22*108mm