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Precision Thread Rolling
Why thread rolled parts instead
of cut or ground ones?
The answer lies in the process itself.
Because thread rolling is a cold forming process, it's done on room temperature blanks. Rotating hardened steel dies are pressed against the surface of cylindrical blank. As the blank rolls against the in-feeding die faces, the material is displaced to form the roots of the thread, and the displaced material flows radially outward to form the thread's crest.
Unlike other threading processes, no material is removed, and no waste chips are produced. Thus, less raw material is needed for a Rolled Thread, 27% less for a 3/8"-16 UNC-2A thread.
The cold forming gives your thread a higher fatigue strength. During the threading process, the surface layer of the raw material is put into compressive stress. There are no sharp corners in the root or tool marks on the flanks to cause stress risers.
No matter what your performance specifications, our custom threaded parts and prethreaded bars have the precise advantages your operation requires.
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Precision Screw Thread Corp.
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 ISO 9001: 2000 and AS9100 B CERTIFIED
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