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2. Grinding wheel - Wikipedia

   en.wikipedia.org/wiki/Grinding_wheel

   A larger grain will cut freely, allowing fast cutting but poor surface finish. Ultra-fine grain sizes are for precision finish work. Generally, grain size of grinding wheels are 10-24 (coarse), 30-60 (medium), 80-200 (fine), and 220-600 (very fine).

3. Thermal lance - Wikipedia

   en.wikipedia.org/wiki/Thermal_lance

   A thermal lance, thermic lance, oxygen lance, or burning bar is a tool that heats and melts steel in the presence of pressurized oxygen to create very high temperatures for cutting. It consists of a long steel tube packed with alloy steel rods, which serve as fuel; these are sometimes mixed with aluminum rods to increase the heat output.

4. Abrasive jet machining - Wikipedia

   en.wikipedia.org/wiki/Abrasive_jet_machining

   Grit size and orifice diameters for various abrasive materials [3] Abrasive material Grit size (μin) Orifice diameter (in) Aluminum oxide: 10–50 0.005–0.018 Silicon carbide: 25–50 0.008–0.018 Glass beads 2500 0.026–0.05

5. Sandpaper - Wikipedia

   en.wikipedia.org/wiki/Sandpaper

   Emery is rated on the average grit size, glued to the backing. Common sizes are, from coarse to fine: 40, 46, 54, 60, 70, 80, 90, 100, 120, 180, 220, 320, F, and FF. A 46 or 54 grade cloth is used on roughly filed work, while 220 to 320 grit cloth will give a good polish. [8]

6. Milling cutter - Wikipedia

   en.wikipedia.org/wiki/Milling_cutter

   Milling cutters are cutting tools typically used in milling machines or machining centres to perform milling operations (and occasionally in other machine tools).They remove material by their movement within the machine (e.g., a ball nose mill) or directly from the cutter's shape (e.g., a form tool such as a hobbing cutter).

7. Disc cutter - Wikipedia

   en.wikipedia.org/wiki/Disc_cutter

   Some discs used for cutting ceramic tile or stone are made from a solid disc with an edge coated with diamond grit. The most common size for these cutting wheels is 4 + 1 ⁄ 2 inches in diameter; however they can range from 2 to 16 inches in diameter with a thickness range from .045 in. to .125 in. Type 1 discs are flat, and type 27 discs have ...