ISOTURN INSERTS NegativePositive USER GUIDE Selection Guide for Chipformers and Grades IS0 K-Cast Iron ‘ Finishing Medium Roughing Tight Tight Tight M3P GN NR GN A A Open Open Open ‘ Finishing Medium Tight Tight SM SM 14 14 Open Open First Choice Recommended Carbide Grades Hard Tough IC5005 IC5010 IC8150 K05 K10 K15 K20 K25 K30 K35 * For CBN and Ceramic grades for hardend steel see page (237) 126 ISCAR