The machine is designed to cut cores up to 150 mm diameter from concrete, asphalt, and similar hard construction materials. It comprises a vertical support column that carries the drill head/motor assembly. The motor assembly comprises a 6.5 hp petrol engine, a ball screw mechanism enables close control of the drilling pressure and rapid return when drilling is completed. A water spraying assembly is mounted on the machine. The complete assembly is supplied on a rigid wheel-mounted metal base frame with leveling and fixing facility during the operation.