According to the shape of the knife:

1. It can be divided into standard knives, with general diameters (1-20mm). Tungsten steel 4-flute, 2-flute milling cutter, tungsten steel ball cutter, tungsten steel round nose cutter.

2. Non-standard knives, variable diameters, weird shapes, and various types, such as tungsten steel small diameter flat knives, deep groove knives, etc.

According to the classification of the processed particles of the knife:

Ultra-fine particle tungsten steel milling cutter, ultra-fine particle tungsten steel milling cutter, ultra-fine ultra-fine particle tungsten steel milling cutter; the hardness of milling cutters processed by different particles is different.