Grindersparks
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Grinder sparks are the debris caused by the rubbing of a piece of metal against a grinding wheel and is a combination of the two materials. The color of the spark denotes the hardness and composition of the metal.
"Fetch me a pail of grindersparks" is also used in a typical tradesman prank, as you cannot catch a spark as it will go out. This is used as a fool's errand to keep an apprentice busy and out of the master's way while supplying humor to members of the shop.
[edit] See also
 Metalworking:
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Abrasive | Angle grinder | Bench grinder | Coated abrasives | Diamond plate | Flick grinder | Grindersparks | Dresser | Grinding machine | Grinding wheel | Jig grinder | Lapping | Emery paper | Spark test | Surface grinder | Tool and Cutter grinder | Whetstone |
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Casting | CNC | Cutting tools | Drilling and threading | Fabrication | Finishing | Grinding | Jewellery | Lathe (tool) | Machining | Machine tooling | Measuring | Metalworking | Hand tools | Metallurgy | Milling | Occupations | Press tools | Smithing | Terminology | Welding |
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