In machining, CBN inserts mainly use the high hardness of CBN and its high temperature resistance, so generally they are not watered.

But this does not mean that cutting fluid cannot be added. If the machining accuracy requirements are relatively high, cutting fluid can also be used considering the thermal deformation of 

parts.

At the same time, the life of the blade may be affected. Therefore, it is best not to add cutting fluid without special requirements.