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Drilling inserts and grades

Indexable drilling grades provide significant productivity increases and long tool life. With each cutting edge, you get excellent chip control, chip evacuation and surface finish.

GC1344 for CoroDrill® DS20

First-choice central insert grade for ISO P, K, S and H materials with PVD-coating produced with Zertivo® coating process technology. Provides excellent wear resistance and toughness.

Features and benefits

  • Excellent edge line security
  • Improved tool life
  • Increased process security and reliability

Reliable and predictable drilling with CoroDrill® DS20

CoroDrill® DS20 is an indexable drilling concept with innovative drill body and insert designs offering reliability, predictability and outstanding penetration rates for your 4–7×DC operations.

CoroDrill® 870 - reliable drilling

This exchangeable tip drill with optimized grade and geometry for steel, stainless steel and cast iron ensures hole quality for the IT9-IT10 intermediate hole tolerance range. CoroDrill® 870 provides high process security and good chip control at high penetration rates.

    Inveio® – uni-directional crystal orientation

    Inveio® – uni-directional crystal orientation

    Tightly packed uni-directional crystals create a strong barrier towards the cutting zone for improved crater and flank wear resistance.

    Zertivo® Technology

    Zertivo® Technology

    Zertivo® is a unique production technology bringing longer tool life and enhanced security to PVD grades.

    Find your grade


    		CoroDrill® 870CoroDrill® DS20CoroDrill® 880CoroDrill® 881
    SteelPGC4334GC4334GC4334GC4044Peripheral grade
    GC1344GC1044GC1044Central grade
    Stainless steelMGC2334GC2044GC2044GC2044Peripheral grade
    GC1144GC1144GC1144Central grade
    Cast ironKGC3334GC4334GC4334GC4044Peripheral grade
    GC1344GC1044GC1044Central grade
    Non-ferrous metalsNGC4334H13AGCN124GC4044Peripheral grade
    H13AGCN134GC1044Central grade
    HRSA and titaniumSGC2334/GC4334GC4344GC4344GC2044Peripheral grade
    GC1344GC1044GC1144Central grade
    Hardened steelH
    		GC4344GC4344GC4044Peripheral grade
    GC1344GC1044GC1044Central grade

    GC1344

    First-choice PVD-coated central grade for ISO P, K, S and H materials. Provides excellent wear resistance and toughness.

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    CoroDrill® DS20: Indexable insert drill for holes from 15-65 mm (0.591-2.56 inch).

    See complete assortment

    GC1044

    The PVD-coated central grade is your first choice for ISO P, K, S and H materials and provides excellent wear resistance and toughness.

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    CoroDrill® 880: Indexable insert drill for holes from 12 to 84 mm (0.472-3.307 inch).

    CoroDrill® 881: Indexable insert drill for holes from 14 to 23.50 mm (0.562–0.937 inch).

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    GC1144

    First-choice PVD-coated central grade, suitable for all types of stainless steels and titanium materials.

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    CoroDrill® DS20: Indexable insert drill for holes from 15-65 mm (0.591-2.56 inch). 

    CoroDrill® 880: Indexable insert drill for holes from 12 to 84 mm (0.472-3.307 inch).

    CoroDrill® 881: Indexable insert drill for holes from 14 to 23.50 mm (0.562–0.937 inch).

    See complete assortment

    GCN134

    First-choice CVD diamond coated central grade, suitable for non-ferrous metal applications. Great wear resistance and excellent function against build-up edge.

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    CoroDrill® 880: Indexable insert drill for holes from 12 to 84 mm (0.472-3.307 inch).

    See complete assortment

    GC2044

    For excellent wear resistance in all types of stainless steels and titanium use this PVD-oxide coated peripheral grade.

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    CoroDrill® DS20: Indexable insert drill for holes from 15-65 mm (0.591-2.56 inch). 

    CoroDrill® 880: Indexable insert drill for holes from 12 to 84 mm (0.472-3.307 inch).

    CoroDrill® 881: Indexable insert drill for holes from 14 to 23.50 mm (0.562–0.937 inch).

    See complete assortment

    GCN124

    First-choice peripheral grade choice in non-ferrous metal applications. Excellent wear resistance and great function against build-up edge.

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    CoroDrill® 880: Indexable insert drill for holes from 12 to 84 mm (0.472-3.307 inch).

    See complete assortment

    GC4334

    First-choice peripheral grade in steel and cast iron applications with good to average conditions. Inveio® technology provides a high level of wear resistance.

    View assortment

    CoroDrill® DS20: Indexable insert drill for holes from 15-65 mm (0.591-2.56 inch).

    CoroDrill® 880: Indexable insert drill for holes from 12 to 84 mm (0.472-3.307 inch).

    See complete assortment

    GC4334

    Tough, high Cr content and fine-grained substrate with thick PVD coating (AlTiN) produced with Zertivo® technology. High reliability with improved edge security provides resistance against built-up edge and chipping.

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    CoroDrill® 870: Exchangeable-tip drill for holes from 10.00 to 33.00 mm (0.394–1.299 inch).

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    GC2334

    Tough, high Cr content and fine-grained substrate with thin multi-layer PVD coating (AlTiCrN) produced with Zertivo® technology. For high reliability and improved resistance against chipping and flaking on secondary edge.

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    CoroDrill® 870: Exchangeable-tip drill for holes from 10.00 to 33.00 mm (0.394–1.299 inch).

    See complete assortment

    GC3334

    Hard and fine-grained substrate with multi-layer PVD coating (AlTiCrN) produced with Zertivo® technology for improved wear resistance.

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    CoroDrill® 870: Exchangeable-tip drill for holes from 10.00 to 33.00 mm (0.394–1.299 inch).

    See complete assortment

    Complementary grades

    View complementary grades

    GC4324

    MT-CVD coated peripheral grade with Inveio® technology is a productive choice in stable conditions.

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    GC4044

    Fine-grain cemented carbide with PVD TiAIN coating. Tough all-round grade for peripheral drilling in all materials. This grade is the predecessor to grade GC4344 with Zertivo®.

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    GC4344

    PVD-coated peripheral grade with Zertivo® technology for tough and demanding operations, it provides good-edge line properties and reliable tool life in average to difficult conditions.

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    H13A

    Universal, tough and uncoated grade best for low to moderate cutting speeds in ISO N material and is a complementary grade for HRSA and titanium.

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    Highlights

    Avoiding wear

    Avoiding wear

    Insert wear problems like built-up edge, flank wear or chipping can slow down production. Read about tips and tricks on how to avoid these common problems.

    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!

    Troubleshooting guide

    Troubleshooting guide

    Incorrect hole size, deflection, vibration or insufficient machine torque can disrupt any drilling operation. This troubleshooting guide gives you valuable tips and tricks to help you find your problem and fix it fast.

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