Detroit Hardness Tester

Description

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.

Physical Features:

• They are pre-tested for positive release and dependable accuracy.
• Weigh only four ounces.
• They are 9 1/4″ in length.
• They are calibrated to “Rockwell Scale”.
• Easy to read.
• Ready to use.
• The hardness tester has no moving parts to get out of adjustment.

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.