How to understand and make the most out of our Grade Tables

  • We use the PMK convention that is used in most of the cutting tool catalogs. (Example P05-15, K25-40, etc.). If you are not familiar with it please read our Detailed Explanation
  • We divide the grades into several "Grade Statuses":
    • Active Main Grades - Are the primary grades of each brand.
    • Active complimentary Grades - These are additional possibilities either older or used for specific situations.
    • You can use the filter above the table to view both or one of them.
    • In addition, we list on the bottom of the page additional older and non-active grades.

Walter Turning Grades Chart

MaterialGradeCoatinggrade_statusApp Range051015202530354045
P - SteelWPP10S (WPP10)CVDMain GradesP05 - P20PPPP
P - SteelWPP05S (WPP05)CVDMain GradesP05 - P15PPP
P - SteelWPP01CVDAdditional GradesP05 - P05P
P - SteelWPP20S (WPP20)CVDMain GradesP10 - P30PPPPP
P - SteelWMP20SCVDAdditional GradesP15 - P35PPPPP
P - SteelWPP30S (WPP30)CVDMain GradesP20 - P40PPPPP
P - SteelWKP33SCVDAdditional GradesP30 - P45PPPP
P - SteelWKP30SCVDAdditional GradesP30 - P45PPPP
M - Stainless SteelWSM10S (WSM10)PVDMain GradesM05 - M20MMMM
M - Stainless SteelWSM01PVDAdditional GradesM05 - M05M
M - Stainless SteelWMP20SCVDMain GradesM10 - M30MMMMM
M - Stainless SteelWSM20S (WSM20)PVDMain GradesM10 - M30MMMMM
M - Stainless SteelWSM30S (WSM30)PVDMain GradesM25 - M40MMMM
K - Cast IronWKK10SCVDMain GradesK05 - K20KKKK
K - Cast IronWKK20SCVDMain GradesK10 - K30KKKKK
K - Cast IronWKK25S (WKK25)PVDAdditional GradesK15 - K35KKKKK
N - Non-FerrousWN10UncoatedMain GradesN05 - N20NNNN
S - SuperalloysWSM10S (WSM10)PVDMain GradesS05 - S20SSSS
S - SuperalloysWSM01PVDMain GradesS05 - S05S
S - SuperalloysWSM20S (WSM20)PVDMain GradesS10 - S30SSSSS
S - SuperalloysWSM30S (WSM30)PVDMain GradesS20 - S40SSSSS

Walter Milling (Indexable) Grades Chart

MaterialGradeCoatinggrade_statusApp Range051015202530354045
P - SteelWKP25S (WKP25)CVDMain GradesP15 - P35PPPPP
P - SteelWKP35GCVDMain GradesP25 - P45PPPPP
P - SteelWSP45S (WSP45S)PVDMain GradesP35 - P45PPP
P - SteelWSM45XCVDMain GradesP35 - P45PPP
P - SteelWMP45GCVDAdditional GradesP35 - P45PPP
M - Stainless SteelWSM35SPVDMain GradesM25 - M45MMMMM
M - Stainless SteelWSP45S (WSP45S)PVDMain GradesM35 - M45MMM
K - Cast IronWAK15CVDMain GradesK05 - K25KKKKK
K - Cast IronWKP25S (WKP25)CVDMain GradesK15 - K35KKKKK
K - Cast IronWKK25S (WKK25)PVDAdditional GradesK15 - K35KKKKK
K - Cast IronWKP35GCVDMain GradesK25 - K45KKKKK
N - Non-FerrousWXN15PVDMain GradesN05 - N25NNNNN

Walter Parting Off Grades Chart

MaterialGradeCoatinggrade_statusApp Range051015202530354045
P - SteelWKP13SCVDMain GradesP05 - P20PPPP
P - SteelWSM23SPVDMain GradesP10 - P30PPPPP
P - SteelWKP23SCVDAdditional GradesP10 - P30PPPPP
P - SteelWKP33SCVDAdditional GradesP20 - P40PPPPP
P - SteelWSM33S (WSM33)PVDMain GradesP20 - P40PPPPP
P - SteelWSM43SPVDMain GradesP30 - P45PPPP
M - Stainless SteelWSM13SPVDMain GradesM05 - M20MMMM
M - Stainless SteelWSM23SPVDMain GradesM10 - M30MMMMM
M - Stainless SteelWSM33S (WSM33)PVDMain GradesM20 - M40MMMMM
M - Stainless SteelWSM43SPVDMain GradesM30 - M45MMMM
K - Cast IronWKP13SCVDMain GradesK05 - K20KKKK
K - Cast IronWKP23SCVDMain GradesK10 - K30KKKKK
K - Cast IronWKP33SCVDMain GradesK20 - K40KKKKK
N - Non-FerrousWN13UncoatedMain GradesN05 - N20NNNN
S - SuperalloysWSM13SPVDMain GradesS05 - S20SSSS
S - SuperalloysWSM23SPVDMain GradesS10 - S30SSSSS
S - SuperalloysWSM33S (WSM33)PVDMain GradesS20 - S40SSSSS
S - SuperalloysWSM43SPVDMain GradesS30 - S45SSSS

Walter Grooving Grades Chart

MaterialGradeCoatinggrade_statusApp Range051015202530354045
P - SteelWKP13SCVDMain GradesP05 - P20PPPP
P - SteelWSM23SPVDMain GradesP10 - P30PPPPP
P - SteelWKP23SCVDAdditional GradesP10 - P30PPPPP
P - SteelWKP33SCVDAdditional GradesP20 - P40PPPPP
P - SteelWSM33S (WSM33)PVDMain GradesP20 - P40PPPPP
P - SteelWSM43SPVDMain GradesP30 - P45PPPP
M - Stainless SteelWSM13SPVDMain GradesM05 - M20MMMM
M - Stainless SteelWSM23SPVDMain GradesM10 - M30MMMMM
M - Stainless SteelWSM33S (WSM33)PVDMain GradesM20 - M40MMMMM
M - Stainless SteelWSM43SPVDMain GradesM30 - M45MMMM
K - Cast IronWKP13SCVDMain GradesK05 - K20KKKK
K - Cast IronWKP23SCVDMain GradesK10 - K30KKKKK
K - Cast IronWKP33SCVDMain GradesK20 - K40KKKKK
N - Non-FerrousWN13UncoatedMain GradesN05 - N20NNNN
S - SuperalloysWSM13SPVDMain GradesS05 - S20SSSS
S - SuperalloysWSM23SPVDMain GradesS10 - S30SSSSS
S - SuperalloysWSM33S (WSM33)PVDMain GradesS20 - S40SSSSS
S - SuperalloysWSM43SPVDMain GradesS30 - S45SSSS

Walter Older Non-Active Grades

A list of additional older grades that are no longer in the Catalog, or had been replaced with moden generation grades.

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