PMC Industries

High production threading of tube and pipe for use by the petroleum industry is accomplished using either mechanically actuated or digitally controlled, carbide tooled machines. The most effective way to deal with residual stress is to full body anneal each tube prior to machining; however, this may not be economically possible. One alternative is to limit the amount of energy that the tube is subjected to during machining. An examination of the cutting tools that are used to produce threaded product will reveal how the shape of the insert may affect the deformation of the tube.

Read Part I Editor's Note: This article, Part II of a two-part series on tube and pipe threading, explores troubleshooting related to threading cutting, insert shape, chip breaker geometry, coatings, and coolants. An examination of the cutting tools used on the finishing floor to...