The cutting tools used on the CNC milling machine should be selected according to the material, geometry, surface quality requirements, heat treatment status, cutting performance and machining allowance of the processed parts, cnc milling service ，and choose the tools with good rigidity and high durability.

Type selection of milling cutter: According to the geometry of the part being machined, the types of cutters selected are:

1. When machining curved parts, in order to ensure that the cutting edge of the tool and the machining contour are tangent at the cutting point, and to avoid interference between the cutting edge and the contour of the workpiece, a ball-end knife is generally used, a two-edged milling cutter for rough machining, semi-finish and fine Four-flute milling cutter for machining.

2. When milling a large plane: In order to improve production efficiency and improve the surface roughness of the machined surface, insert-type disc milling cutters are generally used.

3. General-purpose milling cutters are generally used when milling small planes or stepped surfaces.

4. When milling the keyway, in order to ensure the dimensional accuracy of the groove, a two-edged keyway milling cutter is generally used.

5. Hole processing tools such as drills and boring cutters can be used for hole processing.

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