Korloy DNMG150408-HM NC3120 Universal Steel Turning Insert, R0.8 (10pcs)
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The Original Korloy DNMG150408-HM NC3120 (ANSI Standard: DNMG 432) is the ultimate "Workhorse" 55° diamond turning insert for general-purpose steel machining. This model is specifically engineered to be the most versatile tool in your workshop, featuring a robust 0.8mm nose radius that provides a perfect balance of surface finish and edge durability. The NC3120 grade is designed to perform reliably across a wide range of steel types, handling both smooth continuous cuts and unpredictable interruptions with ease.
Ultimate Reliability: NC3120 is Korloy's most stable grade for steel. It is the go-to solution for machinists who need consistent tool life when working with various steel materials, effectively reducing the need for constant grade changes.
Technical Specifications:
| Brand | Korloy (100% Genuine) |
| ISO Code | DNMG150408-HM |
| ANSI Code | DNMG 432 |
| Grade | NC3120 (Universal CVD for Steel) |
| Nose Radius | 0.8 mm (Strong & Balanced) |
Core Performance Benefits:
- Exceptional Versatility: Optimized for a broad spectrum of steel alloys, from mild low-carbon steel to tough high-alloy steels.
- Durable R0.8 Geometry: Provides significantly higher edge strength than finishing models, allowing for aggressive feeds and deep cuts.
- Stable CVD Coating: NC3120’s multi-layered coating offers a thermal barrier for high speeds and mechanical toughness for interrupted cuts.
- Superior Chip Control: The HM chipbreaker prevents chip accumulation and ensures stable evacuation even in deep-shoulder turning.
Recommended Cutting Parameters:
| Material Group | Cutting Speed (Vc) | Feed Rate (f) | Depth of Cut (ap) |
|---|---|---|---|
| Carbon Steel (S45C / 1045) | 150 - 320 m/min | 0.15 - 0.40 mm/rev | 1.0 - 4.5 mm |
| Alloy Steel (4140 / SCM440) | 120 - 240 m/min | 0.12 - 0.35 mm/rev | 0.8 - 4.0 mm |
| Structural / Mixed Steel | 160 - 300 m/min | 0.15 - 0.45 mm/rev | 1.0 - 5.0 mm |
Compatible Tool Holders:
Standard fit for all 55-degree negative 15-size holders:
- External Turning: DDJNR/L 2020K15 / 2525M15 / 3232P15
- Boring Bars: S25S-DDUNR15 / S32T-DDUNR15 / S40U-DDUNR15
Steel Grade Mastery: NC3120 vs. NC3030
Which grade should you choose for medium-duty turning?
The "Standard". Use this for 80% of your steel turning. It offers higher wear resistance than NC3030, allowing for faster speeds while remaining tough enough for light interruptions.
The "Problem Solver". Switch to NC3030 only when you encounter extreme interruptions, heavy scale (raw forged surface), or severe vibration issues.
Machinist's Pro Tip: For the DNMG150408, NC3120 is the most cost-effective choice for general CNC shops because it reduces inventory while delivering high-speed efficiency and safety.
Packaging: 10 pieces per box.