CBN is obtained through the sintering of Cubic Boron Nitride particles that have higher levels of hardness and toughness, allowing us to obtain high quality finishing.
The continuous development of new types of CBN, together with an accurate mechanical construction of the insert and the cutting edge, allows for an increased cutting speed and process.
CBN inserts are used for machining hardened steels, sintered steels, tungsten carbide, hard nickel, iron, cast iron, pig iron and spheroidal cast iron.
Even more than for PCD inserts, the choice of a specific type of CBN, in relation to the material that you have to work with, is a determining factor for the quality of finish that you want to achieve and for the durability of the insert.
For this reason the choice between the many varieties of CBN must be made each time, carefully evaluating:
- material used (composition)
- machining type (turning, milling ….)
- cutting type (continuous, partially interrupted, interrupted)
- working conditions (dry or refrigerated)
- processing parameters
The main types of CBN can be divided as follows:
Grain 500
Mainly used in the machining of hardened steels for continuous cutting
Grain 600
Ideal for machining hardened steels with average/highly interrupted cutting
Grain 900
The CBN with the highest degree of diamond concentration (from 90%) and is specifically used in the machining of irons.