Edge processing is a key factor in determining the performance of PCBN inserts. In order to avoid cbn insert edge crack and broken due to large loads 

when cutting high-strength materials, ideal machining quality, surface roughness and tool life are achieved for different materials and working 

conditions. It is necessary to do some proper edge treatment on the inserts.

S type (Chamfer+Honing)

Large cutting and deep interrupted cutting preferred;

Higher strength than T-type edge, higher cutting tolerance and more durable life;

Stable roughness retention;

Feed rate must be greater than the size of the sharpening.

T type (Chamfer)

Universal edge processing form;

Compared with S type, it has small cutting resistance and stable size. It is suitable for occasions with strict tolerance requirements;

Preferred cutting edge for cast iron cutting.

E type (Honing)

Fine grinding edge, effective against chip impact;

In order to ensure smooth cutting process to prevent breakage, the feed rate needs to be larger than the grinding size;

Superfine alloy finishing preferred edge.

F type (without chamfer and honing)

Smaller cutting resistance helps reduce surface roughness and is suitable for finishing applications.

Wiper type

Excellent surface quality comparable to grinding;

Better surface quality at the same feed rate;

Maintain higher feed rate under surface quality and greatly improve processing efficiency;

Recommended for continuous processing.