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Milling inserts and grades 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 First choice for roughing to semi-finish face milling, while GC4340 is 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 narrower edge rounding (ER) tolerance.
  • Improved post-treatment technology strengthens the insert by modifying its mechanical properties

Benefits

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


GC1130

For light roughing to finishing operations, steel milling insert GC1130 is a highly reliable grade that provides superior performance in all machining conditions for various component features. GC1130 offers long tool life for a predictable and secure milling process.

Benefits and f​eatures​

  • Ensures secure machining with a long and predictable tool life
  • High metal removal rates and high reliability, even in challenging conditions such as complex tool paths and deep cavities
  • Great performance in both dry and wet machining

Steel milling with GC4330 and GC4340

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

Steel Milling Grade GC1130

Get an in-depth look at the many uses of GC1130.

Performance Results

Learn how the enhanced properties of GC1130 outperforms other grades in customer workshops.

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Optimized for steel milling

Produced with Zertivo™, a unique PVD production technology, GC1130 increases the predictability and security of your milling process.

​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

(Small cutters
and/or low vc, ae)

High heat

(Large cutters
and/or high vc, ae)

GC1130

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

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: 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 in wet and dry machining.

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: First choice for general and repeated shoulder milling.

See complete assortment

GC4340

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

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: 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.

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

GC1010

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

View complete assortment

GC2040

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

View complete assortment

GC3040

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

View complete assortment

M30B

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

View complete assortment

GC1025

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

View complete assortment

Highlights

Made for Milling

You make the components that shape the things around us. We create the precision tools that are #MadeforMilling.

Steel Machinability

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

Hold Tight

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

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