Summary ï¼? Advantages:YN27 hand hold internal-combustion rock drill is a hand-rock drilling tool which integrates the small gasoline-engine,compressor and rock drill. It can blow off the rock powder in the blasthole by the compressing air generatedfrom itself. Just 27kg weight for the main engine . Easy to carry about.Applicable for the areas of high mountains and of without power and wind pressure equipment,especially for those temporary projects with frequent movement. Applications:1. Applicable for rock drilling and breaking.Widely used in the earth and stone work of national defense,mining,road-construction,city construction and quarrying,etc.2. Wide applicability. Regardless of the high mountains,flat grounds,the extremely hot area with the temperature of + 40â?? and bitter cold area of -40â??,it can work in good condition. Technical specifications Weight of the main engine 27kg Type of carburetor Non carburetor float Ignition system Contactless Exhaustion 185cm3 Rotating speed of engine with load (measured in five holes drilling) â?¥2450r/min Idling rotating speed of drill rods â?¥250r/min End of tool shank hex 22*108mm Shock energy â?¥25J Max. elevation angle of drilling 45° Max. drilling depth â?¥6m Tank volume â?¥1.1L Oil consumption(in five holes drilling) â?¤0.12L/m lubrication Automaticly lubricated with gasoline and engine oil Mixing proportion of gas and lubrication(by capacity) 12:1 spark plug electrode gap 0.5-0.6mm