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2. Angle grinder - Wikipedia

   en.wikipedia.org/wiki/Angle_grinder

   Angle grinder. An angle grinder, also known as a side grinder or disc grinder, is a handheld power tool used for grinding (abrasive cutting) and polishing.Although developed originally as tools for rigid abrasive discs, the availability of an interchangeable power source has encouraged their use with a wide variety of cutters and attachments.

3. Grinding (abrasive cutting) - Wikipedia

   en.wikipedia.org/wiki/Grinding_(abrasive_cutting)

   A man grinding on metal using an angle grinder, causing a lot of sparks. Grinding is a type of abrasive machining process which uses a grinding wheel as cutting tool. A wide variety of machines are used for grinding, best classified as portable or stationary: Portable power tools such as angle grinders, die grinders and cut-off saws

4. Grinding machine - Wikipedia

   en.wikipedia.org/wiki/Grinding_machine

   It can also be used to make and sharpen metal stamping die sets, flat shear blades, fixture bases or any flat and parallel surfaces. Surface grinders can be manually operated or have CNC controls. Tool and cutter grinder, which usually can perform the minor function of the drill bit grinder or other specialist toolroom grinding operations.

5. Knife sharpening - Wikipedia

   en.wikipedia.org/wiki/Knife_sharpening

   Recently, manual sharpening tools have appeared in the form of systems that guide the blade against the stone at a predetermined angle. One such system is known as the HORL principle, which combines a cylindrical sharpener with a magnetic angle support, allowing the knife blade to be held at an angle of 15° or 20° while being sharpened with a ...

6. Grinding wheel - Wikipedia

   en.wikipedia.org/wiki/Grinding_wheel

   The abrasive aggregate is selected primarily according to the hardness of the material being cut. Chemical compatibility is also a concern. For example, because carbon alloys with iron, silicon carbide is not suitable for use with iron-based metals like steel. [citation needed] Aluminum oxide (A) Silicon carbide (S) Ceramic (C) Diamond (D, MD, SD)

7. Chisel - Wikipedia

   en.wikipedia.org/wiki/Chisel

   Neolithic stone chisels from Schleswig-Holstein, Germany around 4100 to 2700 BCE A selection of modern wood chisels. A chisel is a wedged hand tool with a characteristically shaped cutting edge on the end of its blade, for carving or cutting a hard material (e.g. wood, stone, or metal).