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Milling inserts and grades for steel

Find your CVD- and PVD-coated carbide grades and uncoated cermets optimized for steel.

GC4330 and GC4340

Grades GC4330 and GC4340 are CVD grades optimized for steel milling, offering substantially increased tool life and improved process security. GC4330 is the first choice for roughing to semi-finish face milling, while GC4340 is the first choice for rough shoulder milling and groove milling.

Technical features

  • Inveio™ coating for high wear resistance and long tool life
  • New substrate in grade GC4330 with well-controlled grain size distribution, which offers more reliable and predictable tool behavior.
  • More consistent tool life with more narrow edge rounding (ER) tolerance.
  • Improved post-treatment technology strengthens the insert by modifying its mechanical properties

Benefits

  • Increased tool life ensures reduced cost per component
  • Improved process security ensures predictable performance and less downtime
  • High component quality

GC1230

Grade GC1230 is optimized for light roughing to finishing operations in steel milling. It covers general applications to challenging applications such as square shoulder, complex tool paths and deep cavities. This grade excels in both edge line toughness and wear resistance, allowing you to opt for a longer tool life or higher productivity, or to machine with a more sustainable approach.

Features and benefits

  • Innovative nano-multilayer coating produced with recognized Zertivo® PVD coating process technology
  • Superior edge line strength means increased tool life, predictability and security
  • Optimized cutting-edge integrity improves wear resistance and reduces flaking and chipping
  • High heat resistance enables higher metal removal rates, even in challenging applications
  • Excellent performance in both dry and wet machining conditions — run dry for a more sustainable process

Steel milling with GC4330 and GC4340

Inveio® technology features tightly-packed unidirectional crystals, which create a strong barrier towards the cutting zone for maximum thermal protection. This has a significant effect on insert strength, wear resistance and tool life.

Optimized for steel milling

Produced with Zertivo™, a unique PVD production technology, GC1230 increases the predictability and security of your milling process.

    Performance Results

    Performance Results

    Learn how the enhanced properties of GC1230 outperforms other grades in customer workshops.

    Steel Milling Grade GC1230

    Steel Milling Grade GC1230

    Get an in-depth look at the many uses of GC1230.

    ​Find your grade

    Our steel insert grade assortment consists of CVD- and PVD-coated carbide grades and uncoated cermets for various machining conditions.

    Stable conditions



    Unstable conditions


    Low heat High heat

    (Small cutters (Large cutters
    and/or low vc, ae) and/or high vc, ae)

    GC1230

    Nano multi-layer PVD-coated grade produced with Zertivo® technology. Designed for light roughing to finishing operations, both for wet and dry machining. Good choice for complex tool paths and sticky materials.

    View assortment

    CoroMill® 176: Indexable insert cutter for productive gear wheel machining.

    CoroMill® 200: Round-insert cutter for roughing in unstable conditions.

    CoroMill® 210: High feed face and plunge milling.

    CoroMill® 216: Ball nose end mill for rough and semi-finish profiling.

    CoroMill® 245: Light-cutting face mill for heavy roughing and mirror finishing.

    CoroMill® 300: Round-insert cutter for roughing to semi finishing in stable conditions.

    CoroMill® 331: Multi-purpose side and face milling cutter.

    CoroMill® 345: The first choice for highly productive face milling.

    CoroMill® 365: Secure face milling in cast iron and steel.

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

    CoroMill® 495: Versatile chamfer cutter.

    CoroMill® 590 (Century): Light cutting face mill for high-speed finishing.

    CoroMill® 600: Versatile round-insert profile milling cutter.

    CoroMill® 690: Long-edge milling cutter for titanium.

    CoroMill® 745: Multi-edge face milling cutter for best production economy in steel and cast iron.

    CoroMill® 790: Shoulder milling cutters for aluminum.

    CoroMill® MF80: For secure face and shoulder milling in close to 90-degree operations with fixture constraints.

    CoroMill® MH20: Secure and reliable machining against shoulders and corners in pocketing.

    See complete assortment

    GC1130

    Hard, thin coated PVD-grade with Zertivo® technology for various applications. Suitable from light roughing to finishing in average stability for wet and dry machining. Good choice for complex tool paths and sticky materials.

    View assortment

    CoroMill® 200: Round-insert cutter for roughing in unstable conditions.

    CoroMill® 210: High feed face and plunge milling.

    CoroMill® 216: Ball nose end mill for rough and semi-finish profiling.

    CoroMill® 245: Light-cutting face mill for heavy roughing and mirror finishing.

    CoroMill® 300: Round-insert cutter for roughing to semi finishing in stable conditions.

    CoroMill® 600: Versatile round-insert profile milling cutter.

    CoroMill® 331: Multi-purpose side and face milling cutter.

    CoroMill® 345: The first choice for highly productive face milling.

    CoroMill® 357: Multi-edge rough face milling cutter.

    CoroMill® 365: Secure face milling in cast iron and steel.

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

    CoroMill® 415: Small-diameter high feed face milling cutter.

    CoroMill® 419: High-feed milling cutter.

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

    CoroMill® 495: Versatile chamfer cutter.

    CoroMill® QD: Deep and narrow grooving.

    See complete assortment

    GC4330

    Medium hard CVD-coated grade (medium to thick coating) designed for medium to rough milling applications in average cutting conditions for wet and dry machining.

    View assortment

    CoroMill® 200: Round insert cutter for roughing in unstable conditions.

    CoroMill® 210: High-feed roughing with high metal removal rate.

    CoroMill® 245: General-purpose cutter with reliable performance.

    CoroMill® 300: Face and profile milling cutters for roughing to semi-finishing in stable conditions.

    CoroMill® 331: High-quality grooving and parting off.

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

    CoroMill® 360: Heavy duty face mill for extremely tough conditions in powerful machines.

    CoroMill® 365: Secure and cost-efficient cast iron machining.

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

    CoroMill® 419: Five-edge cutter for stainless steel and heat-resistant super alloys.

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

    See complete assortment

    GC4340

    Tough CVD-coated grade (medium thick coating) suited for tough and demanding medium to rough milling applications for wet and dry machining.

    View assortment

    CoroMill® 200: Round insert cutter for roughing in unstable conditions.

    CoroMill® 210: High-feed roughing with high metal removal rate.

    CoroMill® 216: Robust ball-nose end mill for roughing to semi-finishing.

    CoroMill® 245: General-purpose cutter with reliable performance.

    CoroMill® 300: Face and profile milling cutters for roughing to semi-finishing in stable conditions.

    CoroMill® 331: High-quality grooving and parting off.

    CoroMill® QD: Deep, narrow grooving and parting off.

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

    CoroMill® 360: Heavy duty face mill for extremely tough conditions in powerful machines.

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

    CoroMill® 415: Cost-efficient high feed face milling in small diameters.

    CoroMill® 419: Five-edge cutter for stainless steel and heat-resistant super alloys.

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

    See complete assortment

    GC4220

    Hard, CVD-coated (thick coating) grade suitable for high cutting speeds in medium to rough milling application with good stability for dry machining.

    View assortment

    CoroMill® 200: Face and profile milling cutters for roughing in unstable conditions.

    CoroMill® 245: Multi-purpose face milling cutters for mixed production.

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

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

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

    See complete assortment

    Complementary grades

    View complementary grades

    GC1010

    Very hard PVD-coated with thin coating for finishing in very stable conditions and hardened materials for wet and dry machining.

    View complete assortment

    CT530

    Medium-hard, uncoated cermet grade for finishing applications at high cutting speeds for dry machining.

    View complete assortment

    GC2030

    Medium hard PVD-coated grade with thin coating for sticky materials for wet and dry machining.

    View complete assortment

    GC2040

    Tough CVD-coated grade (medium thick coating) for roughing in tough and demanding applications for wet and dry machining and good for mix material production.

    View complete assortment

    GC3040

    Medium hard CVD-coated (thick coating) grade which complements GC4230 in abrasive materials.

    View complete assortment

    M30B

    Tough CVD-coated (thin coated) grade for turbine blade machining under tough and demanding conditions at high cutting speeds for wet and dry machining.

    View complete assortment

    GC1025

    Hard PVD-coated grade (thin coating) for light roughing to finishing in sticky materials for wet and dry machining.

    View complete assortment

    Highlights

    Milling power unleashed

    Explore the features and benefits of our indexable steel milling grade GC1230.

      Hold Tight

      Hold Tight

      Learn how to ensure inserts that seats are free from dirt or metal chips after machining.

      Steel Machinability

      Steel Machinability

      The machinability of steel varies depending on the alloy elements, heat treatment, and manufacturing process.

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