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Detroit Hardness Tester
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This hardness tester was designed, and is built,
by metals people who have a constant need for a portable hardness tester. This
hardness tester is already acclaimed by some of the finest plants and machine
shops; it eliminates guesswork and is ideal for spot or production checking. On
the job readings are made anywhere with dependable accuracy.
This ingenious instrument features a steel ball
of exact weight and shape which is dropped from an exact height - thus insuring
a precise reading in "Rockwell C Scale" of the hardness of the material being
tested. Surface to be tested should be free of scale or tool marks and the piece
to be checked should have a thickness of 1" or more.