No more than a decade ago, superabrasives such as poly crystalline diamond (PCD) and cubic boron nitride (CBN) were considered too exotic and too expensive for the average engine builder to use. Today, PCD and CBN are mainstream and you can hardly afford not to use them. The need for faster production speeds and higher quality surface finishes has made superabrasives almost mandatory for most resurfacing, honing and grinding operations.
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