HIGH-END MULTI-PRESENCE

Tools with threaded heads have significant advantages as they demonstrate impressive versatility, provide rational utilisation of cemented carbide and are user-friendly with simple head replacement.

Back in the early 2000s, the introduction of IS-CAR’s MULTI-MASTER system of rotating tools with interchangeable carbide heads played a significant role in the development of cutting tools. Tool assemblies with exchangeable heads were known long before ISCAR’s MULTI-MASTER. This was a product that changed the traditional view of the design concept of such systems.

Within the MULTI-MASTER product line, heads are secured by using a thread connection. Cemented carbide is a very hard and wear-resistant material and has lower impact strength when compared to highspeed steel. In a threaded carbide part, the thread is a source of stress concentrators that is crucial for tool functioning, especially under cyclic loading. Rotating tools with exchangeable carbide heads are reasonable in a relatively small diameter range, typically 6-25 mm (.25”-1.00”), which limits appropriate thread diameters and the height of a thread profile.

The above points make it problematic to use standard threads and strongly determine a special thread shape to comply with the specifications of the connection. Therefore, a thread connection as the head clamping element was highly questionable. Fortunately, the MULTI-MASTER, which is based on the threads of a specially designed profile (Fig.1), dismissed all doubts and its success led to a new look on common canons. Sometime after that, almost every tool manufacturer developed its system for rotating tools with exchangeable threaded carbide heads.