Perfectly Rolled Threads

Precision Thread Rolling

Thread rolling is the ideal way to create custom thread solutions with improved strength and fatigue resistance. The thread rolling process involves pressing rotating hardened steel dies against the surface of a cylindrical blank, displacing material to form the root and crest of the threads. This produces strong, precise threads.

See the thread rolling process in action

Compared to cut or ground threads, rolled threads are often recommended due to their enhanced strength and cost-effectiveness. Cut threads work against the natural grain of the metal, while rolled threads merely reform the existing structures. Rolled threads contain no sharp corners in the thread’s root or tool marks on the thread’s flank. They are also more resistant to wear and stripping, improving screw life.

PST Thread Rolling Services

The PST Group has more than 3,000 dies on hand and can roll parts up to Rockwell RC44. With thousands of dies on hand, years of experience, and expertise with tight tolerances, we can develop innovative threading solutions for you. We have experience working with the following screw threads:

  • Acme
  • Unified
  • Metric
  • Trapezoidal
  • Worms
  • Buttress
  • Ball Screws
  • Rope Threads

AT PST, we are capable of rolling ball screws from 6 mm to 6 inches in diameter with grade 5, .001”/ft lead accuracies.

Wondering if thread rolling is the right process for your screw thread application? Contact one of our thread forming experts below.

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