The H2-20 drilling machine is extremely robust heavy duly, compact and reliable. The sliding group is rectified so as to assure a very soft and accurate drilling movement. An integral water swivel and pump; built into the drill head providing a 12mm connection to an external water supply. Thanks to the built in pump and no need to have a pressured water source. The motor assembly comprises a Japanese Yamaha 4.2/6.5 HP petrol/engine speed of r.p.m 900-1300/min. All working and moving parts are chrome plated for rust protection. Used for making core samples in Asphalt, Concrete etc. Standard: EN12504-1 Main specifications: Model: H2-20 H2-20A H2-20B Max core diameter: Ф200mm Ф200mm Ф200mm Max core depth: 400mm 400mm 700mm Engine capacitity: 4.2HP 4.2HP 6.5HP Vibrating frequency: 2.5KW 2.5KW 2.5KW Voltage: 220V 220V 220V Dimensions(mm): 1080?80?150 1080?80?150 1080?80?150 Net weight: 110kg 115kg 130kg