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Diamond Core Drilling Machine 205MM 8 Inch Concrete Core Drill Boring 110V 750RPM 3980W Core Drill Rig with Stand Tools for Wet Dry Concrete Brick Block Drilling Diamond drilling machine (also known as concrete drilling machine) is a kind of new tool which drills on the reinforced concrete, masonry, and rock, ceramic and refractory, with no dust operations, high efficiency, smooth wall, Size accurate features. Core Drill Rig Applicable to construction, quality inspection, installation areas; such as equipment installation, hydropower, gas installation, civil quality inspection, airport runway, highway, railway, Railway Bridge tunnel and so on. Features: Personal protection switch Cooling Water connection Material lighter and steadier Non water seal cage reduce maintenance costs Secondary hardening gears more durable & powerful Diamond bit and necessary tools ( screwdrivers,wrenches and etc) are available Specifications: MAX.drilling diameter: 8" / 205mm Rated power: 3980W Power supply: 110V / 50Hz Speed: 750 r / min Package Included: 1 x 205mm driller 1 x Diamond bit(Φ108mm/4.25inch) 1 x Box spanner 1 x Monkey wrench 1 x Air tube 4 x Carbon brushes 5 x Screws 1 x English manual