Diamond core drilling machine is one of construction tools, which comes with full copper motors, friction clutch, external carbon brush, soft starting device, overcurrent protection and other devices. It provides different rated input power, 110V / 220V / 240V rated voltage, 50-60Hz rated frequency as well as a wide range of step-less speed to allow the core drill to operate with high efficiency and stability. Besides, the diameter hole capacity from 15mm to 500mm is available for consumers to choose. The drilling machine is widely used to drill holes on reinforced concrete, rocks, brick, stone, ceramics, glass and other building materials, suitable for all kinds of building constructions indoors and outdoors, such as general plumbing, air vent and flue installs. Our diamond core drilling machines for sale at Tool.com offer high quality, factory price, free shipping and satisfying after-sales service for consumers all over the world.