System charts Grafici applicativi Anwendungsgrafiken Graphiques d’application Gráficos aplicativos Диаграммы STEEL APPLICATION Rm [N/mm2] ISO P SUH, 1300 1000 800 600 TA+ PU+ 4HTA+ HPU+ 400 HL+ SUH mini+ HSD+ 40 80 120 160 Vc [m/min] H 1st choice I suitable STAINLESS STEEL APPLICATION Machinability ISO M low SUH+ TA, mediumlow 4HTA+ PU+ medium HPU+ high high HL+ SUH mini+ HSD+ 25 50 75 100 Vc [m/min] PU : universal purpose (page 43) H 1st choice I suitable HPU : universal purpose with inside coolant (page 43) TA : general purpose (page 66) 4HTA : 4 margins general purpose with inside coolant (page 70) SUH : special purpose with inside coolant (page 79) SUH MINI : miniature 5xD ÷ 30xD with inside coolant (page 114) HL : long 12xD ÷ 30xD (page 147) HSD : step drill with inside coolant (page 175) 38