The right-handed and left-handed milling cutter have their own characteristics and advantages:

First, left-hand milling cutter:

1. Features: The rotation direction of the left-handed milling cutter is the opposite of the conventional milling cutter, that is, the counterclockwise rotation. This makes it excellent for thin-walled parts and harder materials during processing. Due to its direction of rotation, the direction of the cutting force generated by the left-hand milling cutter during processing points to the center of the workpiece, helping to reduce workpiece deformation. In addition, the left-handed milling cutter is suitable for high-precision machining needs, especially in the finishing of mobile phone buttons, film switch panels, LCD panels and acrylic lenses.
2. Advantage: The advantage of left-handed milling cutter is that the processing accuracy is high, especially suitable for processing high-precision thin-wall parts and materials after heat treatment. It can effectively avoid the problem of chip stuck in the processing area, make the processing effect smoother, and reduce the deformation of the workpiece.
   Second, right-hand milling cutter:
3. Features: The rotation direction of the right-handed milling cutter is clockwise, opposite to the left-handed milling cutter. This direction of rotation makes the right-handed milling cutter have a higher feed speed and good control in the machining process. However, due to its rotating characteristics, the right-handed milling cutter is prone to problems such as burrs during processing.
4. Advantage: The advantage of right-handed milling cutter is that the processing speed is fast and easy to control, which is suitable for general milling applications. Although it is easy to produce burrs, it can still play a good role in some processing that does not require high surface finish.

In summary, left-handed milling cutters are suitable for high-precision machining and processing of thin-walled parts and hard materials, while right-handed milling cutters show speed and control advantages in general milling applications. In practical applications, the appropriate type of milling cutter should be selected according to the specific processing needs and requirements.