CBN Inserts Multi EdgeCBN Turning Inserts, CBN Grooving Inserts, Low Cost, Multi Edge Sold in 10's. Cubic Boron Nitride for Machining Hardened Steel. Grade CBN1 for Turning hardened Steel 45-65HRC with continuous cut on medium to finishing applications, can also be used in stable Milling applications. Grade CBN2 for Turning hardened Steel 45-65HRC with interrupted cuts.
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