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Korloy TNMG160412-MP NC3225
Korloy TNMG160412-MP NC3225 is a CVD-coated, high-toughness turning insert for steel (including forged and bearing steel) with an MP chip breaker, delivering superior tool life and consistent surface finish.
The Korloy TNMG160412-MP NC3225 is a high-performance triangular (60°) carbide insert designed especially for steel turning applications. It combines Korloy’s NC3225 grade, which features a new-generation CVD coating and a tough substrate, with the MP (medium) chip breaker optimized for stable, medium cutting. This insert excels in continuous and light intermittent turning of carbon steel, alloy steel, bearing steel, and forged steel – making it a versatile choice for industries like automotive, aerospace, die & mold, and general engineering.
Hook / Attention Line
Gear up for longer tool life and lower cost per part — the Korloy TNMG160412-MP NC3225 delivers unmatched stability for steel turning.
Key Features & Specs
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🔧 Grade & Coating: Made with Korloy’s NC3225 grade — a CVD-coated, high-toughness substrate optimized for steel (including forged and bearing steel).
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📐 Geometry: ISO-style TNMG 160412 (60° triangular), neutral (0° relief), with a 1.2 mm corner radius as per spec.
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💥 Chip Breaker: MP (medium) chip-breaker, designed for medium cutting — balances chip control and stability, even under high feed.
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⚙️ Cutting Applications: Ideal for turning operations on general steel, alloy steel, bearing steel, and forged steel. (Korloy markets NC3225 for a wide range of steel turning uses.)
Why It’s a Best Seller
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📈 Longer Tool Life: Thanks to reduced cutting force and Korloy’s improved coating + substrate, NC3225 gives up to 20% longer life than competitor P25 inserts.
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🔄 Stable Production: The MP chip breaker ensures consistent chip control across corners, minimizing downtime and burr on parts.
🔧 Excellent Surface Finish: Lower cutting forces and good edge stability lead to smoother surfaces, reducing post-process rework.
🏭 Application Industries
This insert is a go-to for:
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Automotive (shafts, axles, forged components)
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Aerospace (steel structural / bearing parts)
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Die & Mold (steel workpieces)
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General Engineering (shafts, bearing housings, structural members)
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Frequently Asked Questions
NC3225 is optimized for steel turning, particularly for forged steel, bearing steel, and other general-purpose steels.
The MP chip breaker (medium) offers a balanced chip control and tool stability for medium-depth cuts and higher feeds. It’s ideal for production turning where you want good, consistent chips without sacrificing edge strength.
According to Korloy test data, inserts using NC3225 with MP breaker achieve up to 20% longer tool life compared to a typical P25-grade competitor insert.
Korloy’s tech-news recommends up to ~350 m/min cutting speed and feed up to ~0.35 mm/rev for MP chip breaker in this grade, especially for forged steel.
This insert is particularly beneficial for high-volume machining in automotive (forged components, shafts), aerospace (steel parts), die & mould, and general engineering, where steel parts require long tool life, consistent surface finish, and minimal downtime.
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