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

1. Size of feed per tooth

2. Microtrauma of cutting edge

3. Uneven feed speed

4. Mechanical vibration