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2. Norton Abrasives - Wikipedia

   en.wikipedia.org/wiki/Norton_Abrasives

   Norton Abrasives of Worcester, Massachusetts, USA is the world's largest manufacturer and supplier of abrasives for commercial applications, household, and automotive refinishing usage. Norton Company was founded in 1885 by a group of ceramists and entrepreneurs from Worcester, Massachusetts.

3. John Jeppson - Wikipedia

   en.wikipedia.org/wiki/John_Jeppson

   In 1873 Jeppson managed to produce an artificial emery grinding stone. He continued his experiments and in 1885 the Norton Emery Wheel Company was created with Jeppson as one of the founders. Jeppson became the company’s first plant manager. Jeppson then went on to become the Chief Engineer of the Norton Emery Wheel Company.

4. Scratch hardness - Wikipedia

   en.wikipedia.org/wiki/Scratch_hardness

   Mohs's scale had two limitations: it was not linear, and most modern abrasives fall between 9 and 10.; [6] [7] so, later scientists attempted to increase resolution at the harder end of the scale. Raymond R. Ridgway, a research engineer at the Norton Company, modified the Mohs scale by giving garnet a hardness of 10 and diamond a hardness of 15.

5. Grinding dresser - Wikipedia

   en.wikipedia.org/wiki/Grinding_dresser

   A grinding dresser or wheel dresser is a tool to dress (slightly trim) the surface of a grinding wheel.Grinding dressers are used to return a wheel to its original round shape (to true it up), to expose fresh grains for renewed cutting action (including cleaning away clogged areas), or to make a different profile (cross-sectional shape) on the wheel's edge.

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7. Norton Group Holdings - Wikipedia

   en.wikipedia.org/wiki/Norton_Group_Holdings

   Norton Group Holdings Limited is the British holding company of home improvement retailer CDS (Superstores International) Limited, which includes The Range, Wilko and Homebase, as well as a concession partnership with the Iceland supermarket chain. [1] It is owned by chairman and CEO Chris Dawson's wife Sarah Dawson. [2]