Sandvik Coromant CoroMill 790 insert cuts aluminium well

The machining of aluminium parts, such as aerospace frames, involves the roughing and finishing of cavities, shoulders and edges, and demands both high metal removal rates and good quality surfaces. Until now, indexable insert tooling has not provided the comparably small cutting forces and the soft entry into cut offered by the helix of a solid carbide cutter. Now however, extensive calculations, Finite Element Method (FEM) simulations and testing, along with new grinding and measuring technology, has created a unique combination of new insert geometry features for use with CoroMill 790. These include: an optimised rake angle that makes the edge sharper but retains strength; a more flowing cutting edge that lowers the initial shock of edge entry; a chip former that results in less frictional contact and better chip direction; a primary relief land that acts as a buffer and dampens vibrations as they arise.