The diamond core drilling machines have functions of soft-starting, constant power, over-loading protection and step less speed-regulating and with adjustable bracket can drill an inclined bore at the angle of 0-90 degree.

Diamond drill, also called concrete drill is a new type of tool which can drill on RC, brick and stone, rock and fireproof materials. It is hold such characteristics as working without dust, high efficiency, smooth wall of hole and accurate size.

It is available in many fields of construction, quality-checking, airfield runway, tunnel of road, railroad and railroad bridge.