1. Flank surface wear. The flank surface wears too quickly, the finish is poor, and the dimensions are out of tolerance.

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

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

2. Crater wear.

Problem 1. Excessive crater wear reduces the strength of the cutting edge. Reason: The cutting speed is too high, the feed amount is large, and the tool rake angle is small. Solution: Choose a positive rake angle insert.

Problem 2. The flank surface is worn and the finish is poor. Reason: Improper use of coolant, the cutting temperature of the tool side is too high, causing diffusion wear. Solution: Reduce cutting speed and feed; or increase coolant supply.

3. Plastic deformation. Plastic deformation leads to uncontrolled cutting and poor machining finish.

Reason: The cutting speed is too high and the cutting load is too large. Solution: Reduce cutting speed and feed; choose a harder insert grade.

4. Blade chipping will not only damage the blade, but 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.

Reason 3. Poor processing rigidity. Solution: passivate the cutting edge and round it; or improve the processing rigidity of the system.