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On November 20, 1908, he filed the basic patents for the Sharp-Hughes Rock Bit, and on August 10, 1909, was granted U.S. patent 930,758 and U.S. patent 930,759 for this rock drill. Hughes's two-cone rotary drill bit, nicknamed "rock eater", penetrated medium and hard rock with ten times the speed of any former bit, and its development ...
8 in (203 mm) wire brush mounted to a bench grinder. The wire brush is primarily an abrasive implement, used for cleaning rust and removing paint. It is also used to clean surfaces and to create a better conductive area for attaching electrical connections, such as those between car battery posts and their connectors, should they accumulate a build-up of grime and dirt.
A pneumatic die grinder with a right-angle head. A cordless battery-powered rotary tool used for light tasks. A die grinder or rotary tool is a handheld power tool and multitool used for grinding, sanding, honing, polishing, or machining material (typically metal, but also plastic or wood).
Many rotary unions incorporate multiple ports, some of which are designed to handle different types of material simultaneously. A rotary union with a straight port transfers the substance directly through the rotary union. Other designs include an elbow port, which causes the material to flow out at an angle, and multiple ports.
Drill presses consisted of the powered drills that could be raised or lowered into a material, allowing for less force by the user. In 1813 Richard Trevithick designed a steam-driven rotary drill, also the first drill to be powered by steam. [15] In 1848 J.J. Couch invented the first pneumatic percussion drill. [16] [17] [18]
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