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CLASSIFICATIoN CHART FoR DRILLING GRADES<br />
ISo CLASS UNCoATED CARBIDE CoATED CARBIDE CERMET<br />
P01<br />
P10<br />
P20<br />
P30<br />
P40<br />
P50<br />
M01<br />
M10<br />
M20<br />
M30<br />
M40<br />
K01<br />
K10<br />
K20<br />
K30<br />
K40<br />
C8<br />
C7<br />
C6<br />
C5<br />
C8<br />
C7<br />
C6<br />
C5<br />
C4<br />
C3<br />
C2<br />
10<br />
ISo DESIGNATIoNS<br />
13<br />
P STEELS, TooL STEELS<br />
M STAINLESS STEELS<br />
K CAST IRoN & NoN-FERRoUS METALS<br />
23C 23C 23C<br />
40C 40C<br />
66C 66C<br />
90C<br />
C-1 through C-4<br />
Abrasion resistant grades. Machining<br />
cast iron & short chip materials.<br />
C-1 Roughing<br />
C-2 General Purpose<br />
C-3 Semi-Finishing<br />
C-4 Finishing & Precision Boring<br />
5N & 6N<br />
5N &<br />
6N<br />
5N &<br />
6N<br />
C CLASSIFICATIoNS<br />
9C<br />
9C<br />
Á ToUGHNESS WEAR RESISTANCE�<br />
ÁToUGHNESS WEAR RESISTANCE�<br />
ÁToUGHNESS WEAR RESISTANCE�<br />
C-5 through C-8<br />
Crater resistant grades. Machining steel<br />
& continuous chip materials.<br />
C-5 Roughing & General Purpose<br />
C-6 Semi-Finishing<br />
C-7 Light Finishing<br />
C-8 Finishing & Precision Boring<br />
33
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