System charts Grafici applicativi Anwendungsgrafiken Graphiques d’application Gráficos aplicativos Диаграммы SUPER ALLOYS APPLICATION HRC hardness ISO S 50 40 30 20 TA, 10 HTA, SUH, 4HTA, HPU+ HL, SUH mini, 30 45 60 75 Vc [m/min] + 1st choice , suitable HARDENED STEEL APPLICATION HRC hardness ISO H 62 60 55 50 HRC+ 45 10 15 20 25 Vc [m/min] TA : general purpose (page 51) + 1st choice , suitable HTA : general purpose with inside coolant (page 51) 4HTA : 4 margins general purpose with inside coolant (page 51) HPU : universal purpose with inside coolant (page 81) SUH : special purpose with inside coolant (page 103) HRC : special purpose (page 127) SUH MINI : miniature 5xD ÷ 30xD with inside coolant (page 133) HL : long 12xD ÷ 30xD (page 165) 50