What is the biggest difference between PCD and CBN inserts?


PCD inserts are the first choice in aluminum and magnesium applications, as well as carbon fiber parts, as their extreme hardness provides unmatched life in these non-ferrous materials. Since it is a synthetic diamond (almost pure carbon), it cannot be used to machine ferrous materials like steels and cast irons, because at temperatures over 700° Fahrenheit, carbon atoms react with the part material to form iron carbide and cause the diamond structures to collapse. PCD is especially required when aluminum has more than five percent content, to resist the abrasiveness that leads to wear.

CBN inserts uses boron as the primary element. While boron has a similar crystal structure to carbon, it lacks the affinity to iron. It is the second hardest known material and can tolerate cutting temperatures over 1,800° Fahrenheit. CBN is suitable for steel or iron machining and is the first choice when working with hardened steels, usually more than at least RC50 and should be used for finishing only. Any interrupted cutting requires the highest stability tool, otherwise it won’t work.  

How can Apple carbide tools help when it comes to PCD and CBN inserts?

We are a PCD/CBN inserts manufacturer, we have a lot of knowledge here in-house and are always willing to help metalworkers. Feel free to contact us for more about CBN/PCD inserts.


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