GENERAL TECHNICAL INFORMATION CBN INSERTS RECOMMENDED CUTTING CONDITIONS Grade KB50 TB650 KB90 KB90A Materials V, f, ap Cutting Speed: V (SFM), Feed: f (IPR), Depth of cut: ap (inch) Hardened steel(46 - 68 HRC) V 330 - 820 260 - 650 200 - 490 200 - 490f.004 - .007.004 - .009.004 - .012.004- .012ap.004 - .020.004 - .008.008 - .039.008 - .080 Chilled cast iron(400 HB) Vfap 260 - 490 260 - 490.004 - .012.004 - .012.008 - .060.008 - .080 Gray cast iron(180 - 230 HB) Vfap 1640 - 3930 1640 - 3930.004 - .012.004 - .012.004 - .080.004 - .080 V 330 - 660 Sintered metal f .002 - .008 ap .008 - .040 V 980 - 1970 650 - 1640 DCI rolled, HSS roll f .002 - .008 .002 - .008 ap .008 - .020 .008 - .020 High temp. alloy(200 - 400 HB) Vfap 330 - 980 330 - 980.002 - .008.002 - .008.004 - .020.004 - .080 EDGE PREPARATIONS FOR CBN INSERTS 1. Common style (no designation) Land specification Grade Width (in) Angle (°) Honing (in) KB50, TB650 .005 20 .0006 KB90 .005 20 - KB90A .008 20 .0006 Technical information for CBN inserts CNMA 120408 LN : Regular Size CBN Tip CNMA 120408 LS : Small Size CBN Tip CNMA 120408 LS2 : Small Size CBN Tip with two corners RCGX 090300 FT : Full Top CBN CNMN 090308 SD : Solid CBN 1165