Threadmaking

Thread rolling can produce helical forms accurately and economically.

Rolling worm forms: overview and advantages.

There is an alternative to threading small-diameter holes with taps--using a thread mill.

Understanding the benefits of a laydown threading system.

Thread rolling can save time and money--and lead to the production of better parts.

Advantages of and operating guidelines for thread mills.

A look at the different types of inserts used for single-point threading and how to figure feed rates for cutting threads on a CNC lathe. Also offers programming tips and recommendations for reducing tool wear.

Thread rolling produces OD threads by cold profiling the thread form onto the workpiece rather than cutting. According to this article, this yields significant benefits over using single-point tools to cut threads. The article also discusses the different types of thread-rolling units and their uses on modern machine tools.

Roll-forming taps produce internal threads by displacing the metal under pressure rather than cutting it. This article explains how to perform the operation to achieve good quality threads. Formulas and charts help the user calculate the proper size hole and the size of tap to use for a desired thread.

The advent of CNCs made new threadmaking technologies practical. Among these technologies are rigid tapping and thread milling. This article describes the uses, techniques and benefits of these two threadmaking methods.