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three-in-one heat treating application


CD 1967047 E&MP64.001


no date

Operator inserting balancer shaft in TOCCO Process inductor block for a "three-in-one" heat treating application.

The hardening of two bearing surfaces and the brazing of a collar to the shaft are accomplished all in one 41-second cycle.

Small block at end of shaft is merely a steady rest. 

Original Caption by Science Service
Ohio Crankshaft Company

National Museum of American History


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