Sumitomo develops NEG and NEF chipbreakers for difficult to machine materials
Sumitomo Electric Hardmetal has developed the NEG and NEF chipbreaker styles to enhance tool life and surface finish when turning exotic and heat resisting alloys, titanium and stainless steels.
The NEG chipbreaker insert can be used for roughing and general turning. It has a special design of rake face with a 0.09 mm land and 30º rake angle which enhances resistance to flank wear and helps to reduce the effect of insert cratering. The special rake face also aids the management of chip flow in conjunction with a series of raised round bumps strategically positioned on the top surface of the insert.
The sharp edge and 20º rake angle of the NEF chipbreaker insert, which improves chip control even at small depths of cut, is able to reduce the size of the chip curl and in conjunction with grooves created on the rake face, reduces the active build up of heat in the component.
