Why do we need to passivate the cutting edge of CNC coated end mills? What are the benefits of this operation? These two questions are the most frequently asked by our clients recently. Based on this phenomenon, we will provide specific explanations for everyone in the following content.

The first is to ensure the firmness and service life of the tool coating. This is because modern high-speed cutting and automated CNC machine tools have higher requirements for tool performance and stability, especially CVD coated tools or blades that almost without exception passivate the tool edges before coating, which can also be said to be a requirement of the coating process.

The second is to extend the service life of the cutting tool. According to reports, tool edge passivation can effectively extend tool life by 210% or more, greatly reducing tool costs and bringing huge economic benefits to users.

The third is to reduce the degree of damage caused by the initial use of cutting tools. Because the micro notch of the cutting tool edge is easily expanded during the cutting process, accelerating tool wear and damage. If the tool edge is passivated, this problem can be effectively avoided.

I believe that through the above three points, everyone can have a clearer understanding of the reasons for the passivation treatment of the blade.