Korloy DNMG150408-HM NC3120 Universal Steel Turning Insert, R0.8 (10pcs)
Price shown is a starting point. Contact us for a precise quote based on your requirements.
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.
Technical FAQ & Buying Guide
Absolutely. Our CNC carbide inserts (including CNMG, WNMG, DNMG, and APMT series) are manufactured strictly adhering to international ISO/ANSI specifications. A CNMG 120408 from OYYU BEYOND will flawlessly fit any standard turning tool holder or indexable tool from major global brands like Sandvik Coromant, Kennametal, Iscar, Walter, or SECO, providing a highly cost-effective premium alternative without sacrificing tolerance or tool life.
We offer optimized CVD and PVD multi-layer coatings for different ISO material groups:
- For Carbon/Alloy Steel (ISO P): Choose our thick multi-layer CVD coated grades (e.g., Al2O3 + TiN). They provide exceptional crater wear resistance and thermal barriers during high-speed dry or wet roughing.
- For Stainless Steel (ISO M): Choose our nano-structured PVD coated grades with sharp, positive chipbreakers (like -TM or -MA). This combination prevents work hardening and effectively controls sticky chips.
The optimal cutting parameters vary depending on the workpiece hardness and operation type:
- For General Steel Turnings: Recommended cutting speed ($V_c$) ranges from 150 to 280 m/min, with a feed rate ($f$) of 0.15 to 0.45 mm/rev.
- For Stainless Steel Finishing: Recommended cutting speed ($V_c$) is 120 to 200 m/min, with a feed rate ($f$) of 0.10 to 0.25 mm/rev.Always adjust parameters based on early wear patterns: increase $V_c$ if built-up edge occurs, or reduce $V_c$ if severe flank wear is observed.
Yes, we support machine shops, distributors, and global buyers with tiered wholesale pricing and competitive volume discounts. We also provide OEM custom manufacturing solutions for tool holders and carbide inserts based on your technical drawings. Contact our team to request a quick B2B quotation.
We provide secure worldwide express shipping (via DHL, FedEx, and UPS) with specialized, vibration-proof industrial packaging to ensure tools arrive in perfect condition. In-stock items are dispatched within 24-48 hours, while custom or bulk orders typically have a stable lead time of 15-25 days.
All our cutting tools and tool holders are manufactured strictly in accordance with ISO 9001 and international industrial standards. Every batch undergoes 100% rigorous quality control testing using high-precision optical measuring equipment to ensure reliable tool life and stable performance in continuous mass production.