In the process of metal cutting, the correct selection of PCBN Cutting Tool Inserts parameters, tool geometry and other processing conditions can 

give full play to the high-efficiency and long-life characteristics of PCBN turning tools and create higher economic benefits. But if you use it improperly, 

it will cause a lot of waste. Therefore, how to properly use PCBN tools to achieve cost reduction and efficiency is particularly important.

The cutting speed is mainly selected according to the material to be processed. PCBN inserts have the characteristics of being afraid of softness, not 

hardness, and mainly processing hard and brittle materials. When cutting hardened steel with hardness HRC55~65, the cutting speed is 120~300m/min, 

the cutting depth ap is generally less than 0.3mm, the feed is generally not more than 0.2mm/r; the cutting speed of cutting gray cast iron is 400~ 1200m/min, 

the cutting depth ap is generally less than 3mm, the feed rate is generally not more than 0.5mm / r; the cutting speed of cutting chilled hard alloy cast iron is 

40 ~ 120m / min, the cutting depth ap is generally less than 5mm, the feed is generally not More than 0.8mm / r. The PCBN cutting hard and brittle material is 

softened by softening the metal in a small area in the cutting zone. When the cutting speed is too low, the high temperature resistance of the PCBN tool cannot 

be exerted.