• Flank wear: The most common form of wear is the friction between CBN tools and the hard particles in

the workpiece material. Severe wear can result in poor surface roughness and dimensional accuracy of the

machined workpiece, at this time, the CBN inserts need to be replaced.

  • Crater wear: Occurs on the rake face of thepcbn insert and is caused by a chemical reaction between the

workpiece material and the cutting tool. Crater wear can lead to deterioration of the chip treatment, affecting

the quality of the finished surface, and excessive crater wear can weaken the cutting edge and may cause breakage.

  • Pressure surface wear: The main reason is that the cutting speed is too fast, the feed is too large, and the CBN

inserts clearanceangle is too small to cause the pressure surface wear.

  • Boundary wear: The main reason is that the primaryangle is too large, the feed is too large, and the cutting

speed is too low to cause the boundary wear.

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