The hardness and strength of the parts after quenching become high and the plasticity become poor, which will lead to the processing of the parts become more 

difficult and more difficult. The performance of the cutting tools play an important role in efficiently and accurately machining for the hardened steel parts.

The common carbide inserts for the hardened steel machining results in rapid wear and a sharp drop in tool life. Besides, there have many parts with the hardness 

HRC50-62, and the higher the number, the higher the hardness.

LINKUT Indexable tipped pcbn inserts grades BNT4, BNT6, BNT8 with obvious advantages for the hardened steel parts machining: Better surface finish, longer tool

life and consistent quality.