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  2. Disc cutter - Wikipedia

    en.wikipedia.org/wiki/Disc_cutter

    For long straight cuts on sheet metal or for light cut-off work, a standard circular saw is used with a 7 + 1 ⁄ 4-inch cutting wheel. These cutting discs are made just like the smaller wheels of an angle grinder, with resin bonded abrasive material, or are of metal with a diamond-coated edge. A cutoff saw is used for cutting larger items ...

  3. Grinding wheel - Wikipedia

    en.wikipedia.org/wiki/Grinding_wheel

    Mainly grinding all kinds of metal, for the diameter of the inner wall of the grinding, mold correction. Rubber mounted points: finer particle size sand combined by rubber binder Into, for the polishing of the mold. sandpaper mounted points: Multi-piece rectangular sand cloth, bonding around the metal handle. Granularity is generally in the 60 ...

  4. Abrasive saw - Wikipedia

    en.wikipedia.org/wiki/Abrasive_saw

    Steel cut-off saw for workshop use Cutting heavy steel cable with a Husqvarna freehand saw US Navy diver preparing to use an abrasive saw for underwater salvage. An abrasive saw, also known as a cut-off saw or chop saw, is a circular saw (a kind of power tool) which is typically used to cut hard materials, such as metals, tile, and concrete.

  5. Burr (cutter) - Wikipedia

    en.wikipedia.org/wiki/Burr_(cutter)

    Hard metal or ceramic workpieces cannot flex beyond the cutting edges, so the tools remove material from them. This characteristic makes burrs suitable for use in dentistry , as the tool will grind the hard enamel of teeth, yet leaves soft mouth tissues unharmed if the tool should unintentionally touch them.

  6. Archaeologists Found 115,000-Year-Old Human Footprints Where ...

    www.aol.com/lifestyle/archaeologists-found-115...

    That means their special, tiny batch of preserved footprints were made in unique conditions that also form a kind of “fingerprint” for pinning them all to the same timeframe.

  7. Speeds and feeds - Wikipedia

    en.wikipedia.org/wiki/Speeds_and_feeds

    Cutting speed may be defined as the rate at the workpiece surface, irrespective of the machining operation used. A cutting speed for mild steel of 100 ft/min is the same whether it is the speed of the cutter passing over the workpiece, such as in a turning operation, or the speed of the cutter moving past a workpiece, such as in a milling operation.