Grade Info

General Information:
BrandSumitomo
Grade StatusOld Version
Substrate ClassHard
Coat TypeCVD
Post TreatY

OLD GRADE NOTICE!

AC405K is an older generation grade that is no longer recomended by Sumitomo
The recomended modern alternative is :AC4010K
The data below is the data for AC4010K However, It should be fairly accurate also for AC405K

From Sumitomo's website:

Our first recommended grade for gray cast iron. Ultra-thick coating allows for ultra-high speed machining (vc = 700m/min).



Application Range for AC4010K (AC405K)

Watch the Video:
"How to use the Carbide Grades Information"
and get the most out of this page!


Equivalent Grades for AC4010K (AC405K)

The most compatible grade from each brand!

A higher score (Up to 100%) means the grades are more compatible. A lower score or a particular grade not listed does not mean it is not a good grade. It means that its physical and mechanical properties are less close to echo


Cutting Speed recommendations for AC4010K (AC405K)

How to use our Cutting Speeds Recommendations


  • Pay attention that your desired unit (SFM or m/min) is selected!
  • Speeds are given for stable conditions of Machine, Tool, and workpiece.
  • An empty cell means the grade is not available for the combination of material and application.
  • For more specific Cutting Speeds Recommendations use our advanced
    SPEEDS AND FEEDS CALCULATOR

Unit Selector:

SFM m/min
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