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    GC1010

    GC1010 is a PVD-coated grade for light roughing to finishing operations. Because of its exceptional resistance to plastic deformation, thermal cracking and other types of wear, this grade can withstand long periods of time in cut and is suitable for machining hardened steel from 36 HRC and higher.

    Benefits and features

    • First-choice grade for hardened steel
    • High cutting speeds
    • Offers security and long tool life

    Struggling to find the right tool?

    Struggling to find the right tool?

    Let CoroPlus® ToolGuide help you get quick and accurate tool recommendations – on all your devices!

    Milling hard steel

    Milling hard steel

    Discover more about this material group which contains hardneded and tempered steel with hardness >45-65 HRC.

    Milling - initial considerations

    Milling - initial considerations

    Milling has evolved into a machining method with a very broad range of operations. Configurations have to be carefully considered before milling.

    Find your grade

    Our milling grade chain for hardened steel includes PVD and CVD carbide grades along with CBN-tipped grades, cermets and ceramics for various machining conditions. Use the information below to find the right grade for your production.

    Stable conditions
    find-your-grade-milling-hardened-steel.jpg
    Unstable conditions

    Low heat

    (Small cutters
    and/or low vc, ae)

    High heat

    (Large cutters
    and/or high vc, ae)

    GC1010

    Hard PVD grade with a thin coating for light roughing to finishing of hardened steel with 36 HRC and higher and should be used in stable conditions for both wet and dry machining.

    View assortment

    CoroMill® 216: Ball nose cutters for roughing to semi-finishing.

    CoroMill® 216F: Ball nose cutters for finishing.

    CoroMill® 345: First choice face milling cutters for high productivity.

    CoroMill® 390: Versatile shoulder milling and ramping cutters for mixed production.

    CoroMill® 490: First choice for general and repeated shoulder milling.

    See complete assortment

    GC4220

    Hard CVD grade with a thick coating for light roughing to finishing at low feeds, moderate speeds and large radial engagements in the lower ISO H hardness range for both we and dry machining.

    View assortment

    CoroMill® 245: Multipurpose face milling cutters for mixed production.

    CoroMill® 345: First choice face milling cutters for high productivity.

    See complete assortment

    Complementary grades

    GC1130

    Hard, thin coated PVD grade with Zertivo™ technology for light roughing to finishing at low feeds, moderate speeds and small radial engagements in the lower ISO H hardness range for both wet and dry machining.

    View complete assortment

    CT530

    Medium-hard uncoated cermet grade for light finishing in stable and dry conditions.

    View complete assortment

    CB50

    Hard CBN-tipped grade for semi-finishing to finishing in very stable and dry conditions. Use when dimensional stability and long tool life are crucial.

    View complete assortment

    GC3040

    Medium-hard, thick coated CVD grade that can be used as a backup to GC4220 in unstable and dry conditions.

    View complete assortment

    CC6190

    Hard silicon nitride ceramic grade for light roughing to semi finishing of chilled cast iron at stable and dry conditions.

    View complete assortment

    Highlights

    CVD or PVD?

    CVD or PVD?

    Basic knowledge of cutting tool materials is important to make the correct choice. Learn more about the advantages and recommendations of each cutting tool material.

    Zertivo™ grade GC1130

    Zertivo™ grade GC1130

    Get set for a productive milling future with the impressive combination of CoroMill® 390 and GC1130.

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