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A concrete grinder is an abrasive machine for grinding and polishing concrete and natural stone. Concrete grinders can come in many configurations, the most common being a hand-held general purpose angle grinder, but it may be a specialized tool for countertops or floors. Angle grinders are small and mobile, and allow one to work on harder to ...
Rotating abrasive wheel on a bench grinder. Pedal-powered grinding machine, Russia, 1902. A grinding machine, often shortened to grinder, is any of various power tools or machine tools used for grinding. It is a type of material removal using an abrasive wheel as the cutting tool. [1]
Craftsman No. 5 jack plane A hand plane in use. A hand plane is a tool for shaping wood using muscle power to force the cutting blade over the wood surface. Some rotary power planers are motorized power tools used for the same types of larger tasks, but are unsuitable for fine-scale planing, where a miniature hand plane is used.
Thickness planer. A thickness planer (also known in the UK and Australia as a thicknesser or in North America as a planer) is a woodworking machine to trim boards to a consistent thickness throughout their length. This machine transcribes the desired thickness using the downside as a reference / index.
The Shopsmith is a lathe-based multi-tool that uses a single motor to perform lathe, tablesaw, sanding, and drill press functions. Variations include horizontal boring and disc sander . The original Shopsmith 10E and 10ER were invented by Dr. Hans Goldschmidt [ 1 ] of Albany, CA , in 1947; made by the Magna America Corporation in Berkeley, CA ...
High end or professional grade jointer-planer discernible by the integral vacuum reservoir, metal blade guard, and the very long infeed and outfeed tables. The moderately wide (4-8 inches, 10-20 centimeters) tables make it suitable for single side power planing operations. Bench top jointer.
The Curta was conceived by Curt Herzstark in the 1930s in Vienna, Austria.By 1938, he had filed a key patent, covering his complemented stepped drum. [3] [4] This single drum replaced the multiple drums, typically around 10 or so, of contemporary calculators, and it enabled not only addition, but subtraction through nines complement math, essentially subtracting by adding.
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