• Step 2 • Select the grade (continued)

Negative Insert Geometry Positive Insert Geometry

cutting condition-FF-ML-UR..MA-FP-MU-MP
heavily interrupted cutWK20CTWK20CTWK20CTWK20CTWK20CTWK20CTWK20CT
lightly interrupted cutWK20CTWK20CTWK20CTWK20CTWK20CTWK20CTWK20CT

varying depth of cut,

WK20CT WK05CT WK20CT WK05CT WK20CT WK20CT WK20CT

casting, or forging skin WK20CT/

smooth cut, pre-turned surface WK20CT WK05CT WS10PT WK05CT WK20CT WK05CT/ WK20CT

WS10PT

  • 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

WK05CT 450 K1 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

WS10PT 200

K2 WK05CT 360

WK20CT 240

Ductile, Malleable, and Austempered 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

WS10PT 150

K3 WK05CT 240

WK20CT 210