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abrasive Alfred Herbert alumina aluminum Alundum amount Bakelite band saw bauxite belt bricks cam grinding Carboloy carbon steel cause cement center holes chatter marks chine coarser condition cracks cutters cutting cylinder cylindrical grinding machine diameter dressing drill electric furnace equipment factors filer finish Floor Stand fused alumina gears grain and grade grinding machine grinding wheel GRITS GRJTS and GRJNDS ground H. W. Dunbar hardened Hdwe headstock heat heavy Henry Disston high speed steel important industry iron back June Page Knife Grinding Lapping Machines lubricant Machine Division manufacture material metal method motor mullite necessary Norton Company Norton grinding operation polishing wheel Precision Grinding proper pump refractory removed require roll saw gumming Saw Mills Saw Sharpening shape shellac silicate silicon carbide sodium silicate soft softer wheels Supply surface grinding temperature tion tool vibration vitrified wheels wheel acts wheel face wheel speed wheel spindle wheel wear Worcester