Threading inserts are replaceable cutting inserts that are used to create internal or external threads. They are used typically with a tool holder on a lathe or turning center.
Threading inserts provide an alternative to thread mills and thread rolling, other methods for creating threads on a workpiece. Like all tools, these replaceable commodities are wear items.
Although some threading inserts have only one cutting surface, others have multiple cutters so that when one tooth wears out, work can move to a sharp tooth. The threading insert’s shape determines the number of sides and cutting angles.
Other types of threading inserts include ball nose, radius tip, and chamfer tip mills. Dogbone threading inserts are available, too. These two-edged inserts have a narrow mounting center and, as their name implies, a broader cutting feature on both ends. They are often used for grooving.
