Dormer Pramet unveils milling grades for hard materials

Dormer Pramet has launched developed two grades for milling hard materials. M4303 and M4310 are said to provide durability and reliability in semi-finishing and finishing applications. The company has also introduced its latest thread-turning grade, T8010.

Both milling grades are designed for high-speed applications in the mould and die sector, offering consistent wear and longer tool life. An ultra-thin PVD coating increases cutting edge toughness, while its substrate provides high hardness and strength, preventing fracture by chipping.

Created within the company’s Pramet range, M4303 replaces the previous 7205 grade and provides superior wear resistance. M4303 has been developed for hardened steel above 55 HRc (and cast iron), but can also be used for machining steels and non-ferrous metals.

M4310 takes over from the existing 7215 grade and is said to offer an optimum balance of toughness and wear resistance when machining hardened steel and cast iron. The grade can also be deployed on stainless steel, steel and non-ferrous metals.

Meanwhile, Dormer Pramet has released a wear-resistant grade for thread turning. T8010 is suitable for the continuous thread turning of steel, stainless steel, cast iron and super alloy materials. A hard substrate and PVD coating has been optimised to deal with interior residual stress, helping to improve tool life. The grade further extends the company’s Pramet assortment in this application area and supports the universal T8030 grade.

Offering wear resistance while ensuring operational reliability, T8010 has enhanced plastic deformation resistance, which provides a stable cutting edge and allows for increased speeds. A gold finish on the insert provides a simple wear indicator.