Korloy MGMN300-G NC3020 3mm Double-Ended Grooving Insert for Steel (10pcs)
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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.
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