This means that one insert has eight positive cutting edges making the CBN300 chipbreaker insert very cost effective and user friendly.
The CBN300 chipbreaker is designed with an increased rake angle, which thereby increasing the cutting edge shear angle.
This leads to lower cutting forces and thus lower levels of transferred energy. The result is lower temperature levels in the cutting zone.
Improvement in tool life has been realised through reduced crater wear, due to lower temperature and load.
Reduction in both cutting temperature and cutting forces leads to a reduction in possible chemical attack of the cutting edge, thereby increasing tool life.
The advantages to the workpiece are improved component accuracy due to lower cutting forces. In addition there is an improvement in surface finish due to the improved chip flow.
Tests carried out in machining cylinder bores with CBN300 chip breaker showed an increase in tool life of 50 % compared with the equivalent negative rake insert geometry.