Usx Corporation

George John Palyo, Iii

William Boyd Sargent

A method is provided for machining threads on cylindrical parts, particularly oil country tubular goods, by mounting four thread-cutting chasers in a die head of a thread cutting machine. The thread chasers are each of unique profile, which enables the cutting of threads to close tolerance and decreases metal burrs on the first and last threads cut on the part by reducing the total tool cutting forces imposed on the part and said threading machine.

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Houston, TX, United States of America

George John Palyo, Iii