Technical Information Grades and Grade Descriptions Modern coating technologiesprovide higher speed capabilities,PSteel greater productivity, and longer M Stainless Steel tool life. K Cast Iron Each insert has a material grid N Non-Ferrous indicating primary and alternate uses for that tool, as well as S High-Temp Alloys whether it can be operated H Hardened Materials dry or with coolant. primary use alternate use WWW Light (finishing) ¢¢¢ Light (finishing) WW Medium ¢¢ Medium W Heavy (roughing) ¢ Heavy (roughing) Grade P M K N S H dry withcoolant WS30PM™ ¢¢ WW WW • • PVD-AlTiN Multilayer WU35PM W W W • • PVD-AlTiN Multilayer WP35CM W ¢ W • MT-CVD/TiN-TiCN-Al2O3 WP40PM™ W W ¢ • • PVD TiAlN-AlCrN Multilayer WK25YM WW • Silicon Nitride WDN00U™ WWW WW • W Ultra-fine grain PCD widia.com G19