SUMITOMO NU-TPGX21.51 CBN INSERT, BN250SUMITOMO NU-TPGX21.51 CBN INSERT, BN250 1657634, 1 PER BOX, 1/64" CORNER RADIUS, FOR HARDENED STEEL & CAST IRONS This insert has a 3/8" I.C. and is .094" thick, with a .0156" corner radius. The insert hole diameter is .110" and the maximum depth of cut is .015". The BN250 Grade is for continous or mild interrupted cutting of hardened steels and cast iron. Many other CBN type inserts are available, Word Search for HARD TURNING INSERT on our website for details!
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