The purpose of coating CBN tools is to extend the life of the inserts and increase productivity, and to achieve the lowest single-piece processing costs for more manufacturers in the powder metallurgy, automotive parts industries etc. After coating, the performance of the tool is improved and the tool life is significantly extended. The more stable processing performance can obviously improve the surface finish of the workpiece. In addition, longer-life CBN tools can reduce insert consumption, help reduce inventory, and achieve higher productivity and benefits for our customers.