Intermittent cutting refers to the continuous impact and friction on the cutting tool during the cutting process, resulting in severe tool wear and shortened service life. Therefore, selecting appropriate insert materials and coatings is crucial for improving tool life and cutting efficiency.

For intermittent cutting of gears, LINKUT recommends using coated CBN inserts. In general,  coated CBN inserts have the characteristics of high hardness, high wear resistance, and high impact resistance, which can effectively cope with the impact and friction generated during intermittent cutting. Coating can further improve the hardness and wear resistance of the insert, while also reducing the friction coefficient between the insert and the workpiece, reducing heat generation, and improving tool life.

At present, BNT2C, BNT4C, and BNT8C are the three composite coated CBN inserts promoted by LINKUT. The coated CBN inserts have high resistance to fragmentation and collapse. Common gears, gear shafts, transmission shafts, wind bearings, hub bearings, rotary support bearings, ball screws, synchronizers, ball cages, three pin shafts, cross shafts, etc. in quenched steel parts can all choose LINKUT coated CBN inserts.

Customer feedback shows that the intermittent precision machining of planetary gears with coated CBN inserts not only meets the requirements for machining roughness, but also increases the tool life by 1.5 times compared to CBN inserts without coating. So the advantages of coated CBN inserts in intermittent cutting of gears are obvious and worth recommending.