ISOTURN INSERTS NegativePositive USER GUIDE Selection Guide for Chipformers and Grades IS0 N-Aluminum ‘ Finishing Medium Roughing Tight Tight Tight NF PP NMS12 F3N M3N Open Open Open Finishing Tight AS Open First Choice Recommended Carbide Grades Hard Tough ID5 *PCD IC520 IC20 N05 N10 N15 N20 N25 N30 N35 128 ISCAR