High-Performance Inserts Widia Cast Iron Grey and Ductile Irons Step 2 Select the grade Negative Insert Geometry Positive Insert Geometry cutting c

High-Performance Inserts Widia Cast Iron Grey and Ductile Irons Step 2 Select the grade Negative Insert Geometry Positive Insert Geometry cutting condition -FF -ML -UR MA -FP -MU -MP heavily interrupted cut & WK20CT WK20CT WK20CT WK20CT WK20CT WK20CT WK20CT lightly interrupted cut c WK20CT WK20CT WK20CT WK20CT WK20CT WK20CT WK20CT varying depth of cut, casting, or forging skin c WK20CT WK05CT WK20CT WK05CT WK20CT WK20CT WK20CT smooth cut, pre-turned surface o WK20CT WK05CT WS10PT WK05CT WK20CT WK20CT/ WK05CT/ WS10PT WK20CT Step 3 Select the cutting speed Grey Cast Iron speed m/min Starting Conditions material group grade 60 180 305 430 550 675 800 920 1040 1160 m/min K1 WK05CT 450 WK20CT 300 Ductile, Compacted Graphite, and Malleable Cast Irons (<600 MPa tensile strength) speed m/min Starting Conditions material group grade 90 135 180 225 275 320 360 410 460 500 m/min K2 WS10PT 200 WK05CT 360 WK20CT <1> 240 Ductile, Malleable, and Austempered Cast Irons (>600 MPa tensile strength) speed m/min Starting Conditions <'J-> material group grade 90 135 180 225 275 320 360 410 460 500 m/min K3 WS10PT <1> 150 WK05CT 240 WK20CT 210 Widia Victory