Some people will find that there will be knife lines when they are milling, which not only affects the beauty of the workpiece, but also affects the quality of the workpiece. What is the reason for the knife lines? In fact, there are only the following reasons for the occurrence of the general face milling cutter pattern.

1. The size of the feed per tooth

2. Micro-trauma on the cutting edge of the tool

3. Uneven feed speed

4. Mechanical vibration