Threading

Threading forms or cuts a helical ridge on bar and rod. It is used to make fasteners and threaded connections.

Thread rolling presses the blank between rotating dies to form the thread by displacement. Thread cutting removes material with a die or single point tool. Both methods are usually followed by deburring and inspection.

Threading is often done on mild steel, high tensile steel, low carbon steel, stainless steel, brass and re-bar. High tensile and stainless steels are harder to thread and may need slower speeds or special tooling.

Ask about the largest bar diameter and the longest thread length the machines can handle. Ask how many thread rolling machines are available and the typical run size for cutting.