hydraulic rock drill mounted on excavator, do not need compressor Our YYTZ26 Hydraulic rock drill can mounted on excavator boom, use the excavator'shydraulic system to drive the drill. 360 degree turnning. With water pump equiped, do not needcompressor to clean the hole dust.Drilling speed can reach 1200mm per nimuteHole diameter 32~46mmDepth 8mfeeding stroke: 2m or 3m excavator-mounted hydraulic ...