1. Flank surface wear. The flank surface wears too quickly, the smoothness is poor, and the edge is prone to chipping.

Reason 1. The cutting parameters are inappropriate. Solution: Increase the tool feed per tooth or reduce the cutting speed.

Reason 2. The blade is not wear-resistant. Solution: Choose a more wear-resistant blade grade.

2. Crater wear. The crater wear is severe and the cutting edge is cracked, resulting in poor processing finish.

Reason 1. The cutting speed is too high. Solution: Reduce cutting speed.

Reason 2. The blade has low wear resistance. Solution: Choose a more wear-resistant blade grade.

3. Broken blade. Not only will it damage the blade, but it will also damage the tool pad, cutterhead and workpiece.

Reason 1. The cutting parameters are inappropriate. Solution: Increase the cutting speed, or reduce the feed per tooth.

Reason 2. The blade is not willful. Solution: Choose a blade with good toughness, or blunt and rounded edges

Reason 3. Poor processing rigidity. Solution: Improve system processing rigidity.

4. Thermal cracks. Thermal stress causes thermal cracking and affects tool life.

Reason: Drastic changes in temperature produce thermal stress, causing thermal cracks perpendicular to the cutting edge.

Solution: 1. Change to a smaller diameter milling cutter. 2. Reduce the cutting speed. 3. Reduce the feed per tooth. 4. Choose a grade with good toughness. 5. No coolant is required.