Solid CBN inserts are always used for rough and mid-finishmachining hard ferrous metal, just like hard cast iron workpieceand hardened steel workpiece. The main and typical application caseof Solid CBN inserts is the rough machining of large CI roll,slurry pump, industrial pump, large hardened steel workpiece and soon. The unique advantages of Solid CBN are listed as follow: canunder quite considerable cutting depth, good performance at impactresistance, wearable, long service life, high production efficiencyand so on.