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Job Description:

  • 1) Operates pebble mill to grind emery, rouge, and other abrasives and separates them according to fineness by water suspension method: Examines abrasive under microscope to determine grinding time required, and grinds abrasive in pebble mill.

  • 2) Turns valve to allow ground particles and water to flow into agitator tank.

  • 3) Presses button to start agitator which stirs particles into suspension.

  • 4) Stops machine and determines by microscopic examination when particles of particular grade have settled below tank outlet.

  • 5) Opens stopcock to allow particles remaining above the outlet to descend into vat.

  • 6) Repeats separation process for other grades, regrinding as required.




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End Of Job Description for: "ABRASIVE GRADER"
DOT:   570.682-010

Job Number: 2