Steel that breaks into small chips in cutting operations resulting in an increase in machinability, a superior surface finish, and long tool life.
For instance, one of the most commonly used free machining steel grades is 12L14 bar. This is a standard resulfurized and rephosphorized grade carbon steel that can often be found in automatic screw machines that manufacture such parts as bushings or couplings.
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For more key terms, check out The Gauge Glossary!
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