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Korloy KGMN400-04-T CN2500
Unlock higher productivity with the Korloy KGMN400-04-T CN2500 — a premium cermet insert that delivers long tool life, stable cutting in interrupted conditions, and outstanding surface finish. Ideal for demanding steel turning in automotive, aerospace & die-mold. DM or WhatsApp us at CNC Tools Depot to check availability & price now.
🔧 Attention Machinists: Want fewer tool changes and better finishes on tough forging-steel jobs? The Korloy KGMN400-04-T CN2500 insert is engineered to deliver longer tool life + cost-per-part savings — especially in heavy, interrupted cuts.
Key Features & Specifications:
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Geometry / Shape: KGMN family, “T” type — optimized for multi-grooving, turning, and facing applications.
Insert Size: 400 (i.e., 4.0 mm width) × 0.4 corner radius.
Grade: CN2500 — a specially-sintered cermet grade. -
Coating / Substrate: Uncoated cermet, ultra-fine micro-grain matrix for high wear resistance and thermal stability.
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Cutting Applications: Excellent for turning, multi-grooving, facing, and even parting-off when paired with KGT holders.
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Recommended Cutting Speed: For steel / forged steel, typical range according to Korloy is ~130–240 m/min for CN2500.
Why It’s a Best Seller
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Stable Life Under Harsh Conditions: The CN2500 grade's uniform micro-grain structure gives superior resistance to chipping and thermal cracking — even when you're machining heavy, interrupted-forging steel or sintered ferrous material.
Excellent Surface Finish: Thanks to the optimized cutting-edge design, you get smoother surfaces — Korloy data shows up to 1.4× better surface finish compared to previous generations.
Less Downtime: With its robust grade and geometry, this insert reduces the frequency of tool change, minimizing production interruptions and improving productivity. -
Consistent Performance: Designed for demanding applications, the insert provides "minimum tolerance, stable tool life, and geometric repeatability" as per Korloy’s own specification sheet.
Application Industries:
This insert shines in:
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Automotive — machining forged shafts, gear blanks, high-strength alloy steels
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Aerospace — precision turning of high-strength components (shafts, housings) with demanding finishes
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Die & Mold — for grooving, finishing of hardened / ground tooling parts
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General Engineering — for high-volume turning, multi-operation workpieces
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Frequently Asked Questions
CN2500 is a next-generation cermet grade with a uniformly sintered micro-grain structure. This gives it high resistance to chipping, thermal cracking, and ensures good stability under heavy, interrupted cuts.
Yes — the KGMN (multi-functional) geometry is designed for turning, grooving, and facing. When paired with a strong clamping toolholder (like Korloy KGT series), it handles interrupted cuts very reliably.
It works exceptionally well on carbon steels, forged steels, sintered ferrous alloys and alloy steels. Korloy specifically developed CN2500 for tough, high-impact conditions.
According to Korloy’s catalog, for steel-turning applications with CN2500, recommended cutting speeds lie in the range of ~130–240 m/min depending on the alloy and cutting conditions.
Since the CN2500 grade offers very stable tool life, you change the insert less frequently. Combined with excellent resistance to wear and chipping, this reduces machine downtime and cutting-tool spend per part while maintaining high surface quality.
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