
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 | WK20CT | WK20CT | WK20CT | WK20CT | WK20CT | WK20CT | WK20CT |
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
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