Korloy MGMN300-G NC3020 3mm Double-Ended Grooving Insert for Steel (10pcs)
Price shown is a starting point. Contact us for a precise quote based on your requirements.
The Original Korloy MGMN300-G NC3020 is the definitive choice for 3.0mm Double-Ended Grooving and Parting. As one of the most widely used inserts in the industry, the MGMN300-G balances immense cutting edge strength with a highly efficient chip-breaking geometry. Coated with the NC3020 CVD grade, this insert is purpose-built for high-speed operations in Steel (P) and Alloy Steel. Whether you are performing deep radial plunging or multi-directional profiling, this insert delivers consistent performance and exceptional tool life.
Maximum Versatility: The -G (General) chipbreaker features a reinforced rake angle that handles a variety of feed rates. It is the "workhorse" of the machine shop, capable of transitioning from heavy parting-off to light-duty side turning without changing the tool.
Technical Specifications:
| Brand | Korloy (100% Genuine) |
| ISO Code | MGMN300-G |
| Insert Width (w) | 3.0 mm |
| Grade | NC3020 (Hardened CVD Coating) |
| Edge Design | Double-Ended (Economy & Performance) |
Core Performance Benefits:
- Engineered for Speed: NC3020 allows for significantly higher cutting speeds (Vc) compared to general-purpose grades, reducing your overall cycle time.
- Robust 3mm Geometry: The 3.0mm width provides enough mass to absorb heat and resist deflection during heavy-load side turning.
- Stable Chip Control: The -G chipbreaker effectively curls chips to prevent tool tangling, even when machining gummy low-carbon steels.
- Cost-Effective: Two sharp edges per insert provide a low cost-per-cut, maximizing your production budget.
Recommended Cutting Parameters:
| Material Group | Cutting Speed (Vc) | Feed Rate (f) |
|---|---|---|
| Low Carbon Steel | 150 - 250 m/min | 0.08 - 0.22 mm/rev |
| Alloy Steel | 120 - 210 m/min | 0.06 - 0.18 mm/rev |
| Ductile Cast Iron | 100 - 180 m/min | 0.10 - 0.25 mm/rev |
Compatible Tool Holders:
Pairs perfectly with any standard 3.0mm MGEHR/L or MGIVR (internal) holders:
- External Holders: MGEHR 1616-3 / 2020-3 / 2525-3
- Internal Holders: MGIVR 2016-3 / 2520-3
The 3.0mm Standard: NC3020 vs. NC3030
Which steel grade should you choose for your 3mm grooving operations?
The Productivity King. Optimized for stable machining and higher cutting speeds. It offers superior wear resistance and is the first choice for long continuous runs.
The Interruption Specialist. Best for interrupted cuts, heavy forging skin, or when machining on older lathes with vibration issues.
Machinist's Pro Tip: For the MGMN300-G, the 3mm width allows for a more aggressive feed rate than the 2mm versions. However, when parting-off large diameter bars, remember to reduce the feed rate by 50% as you approach the center of the bar to avoid tip breakage.
Packaging: 10 pieces per box.
Korloy MGMN300-G price, 3mm grooving insert for steel turning, MGMN300-G NC3020 cutting data, best parting insert for 1045 steel, double ended 3.0mm CNC grooving tip
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.