New grades for roughing stainless steel

A new generation of grades developed by Boehlerit for rough-turning stainless steels is available from Horn under a joint sales co-operation agreement between the two tool manufacturers. The tools are the result of innovations in carbide manufacture, insert coating and chip flow, with parameters finely tuned to create the new grades: BCP10T, BCP15T, BCP20T and BCP25T.

Horn says that all grades offer high performance and reliability throughout the entire turning process. Designated MRM, a special chip breaker with a modified chamfer suppresses a significant proportion of the vibration generated by the machining process to ensure reliable chip flow.

According to Horn, the new AlTiN PVD coating meets demanding temperature and toughness requirements, while its golden colour allows easy wear detection. The coating allows the machining of small diameter components, as it is capable of operating at low cutting speeds. In addition, the coating makes the grades suitable for turning when the tool is required to enter the material frequently.

With the new MRM chip breaker, Boehlerit has extended its ISO turning portfolio for medium to heavy roughing of stainless steels and can now offer indexable insert geometry for virtually any application. The chip breaker is an extension of the established BMRS geometry. Although the feed rate ranges are similar, MRM boasts a deeper rake angle, resulting in significant differences in micro-geometry. Boehlerit says this development reduces the cutting force, increases process safety and extends cutter life when machining hard stainless steels.

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