Korloy MGMN300-G NC3030 3mm Double-Ended Tough 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 NC3030 is a powerhouse 3.0mm Double-Ended Grooving Insert designed for Extreme Toughness and Shock Resistance. As the industry's most trusted choice for difficult steel applications, the 3.0mm width combined with the NC3030 CVD coating provides a rigid platform for heavy-duty parting and grooving. This insert is specifically engineered to excel where others fail: in interrupted cuts, heavy scale surfaces, and unstable machining setups.
Superior Impact Protection: The NC3030 grade features a specialized cobalt-rich substrate that absorbs mechanical shock. If you are machining hexagonal bars or parts with cross-holes, the MGMN300-G NC3030 is your primary insurance against premature edge chipping.
Technical Specifications:
| Brand | Korloy (100% Genuine) |
| ISO Code | MGMN300-G |
| Width (w) | 3.0 mm |
| Grade | NC3030 (High-Toughness CVD) |
| Geometry | -G (Reinforced Universal Edge) |
Core Performance Benefits:
- Unmatched Reliability: Optimized for non-continuous cutting, effectively preventing "snapped" tips in alloy and carbon steels.
- Double-Ended Economy: Two sharp, usable cutting edges per insert help you maintain high production volumes at a lower cost-per-part.
- Robust 3mm Blade: Provides excellent thermal mass to withstand the high heat generated during heavy-duty dry machining or interrupted cycles.
- Excellent Chip Control: The -G chipbreaker is designed for heavy-duty use, curling chips tightly even at high feed rates to prevent "bird-nesting."
Recommended Cutting Parameters:
| Machining Condition | Cutting Speed (Vc) | Feed Rate (f) |
|---|---|---|
| Carbon Steel (Interrupted) | 90 - 160 m/min | 0.08 - 0.20 mm/rev |
| Alloy Steel (Forged) | 80 - 140 m/min | 0.06 - 0.18 mm/rev |
| General Steel Parting | 100 - 180 m/min | 0.10 - 0.22 mm/rev |
Compatible Tool Holders:
The MGMN300 series is compatible with standard 3.0mm MGEHR/L and MGIVR holders:
- External Holders: MGEHR 1616-3 / 2020-3 / 2525-3
- Internal Holders: MGIVR 2016-3 / 2520-3
Steel Machining Logic: NC3030 vs. NC3020
Both are CVD grades for steel, but your choice should be based on process stability:
The Reliability King. Use this for any interrupted cut, unstable machine, or when parting-off to the center of a large bar where shock is high.
The Productivity King. Use this for high-speed, continuous, and stable cutting environments to maximize wear resistance and tool life.
Machinist's Pro Tip: For the MGMN300-G NC3030, if you notice vibration during a deep cut, try reducing the cutting speed (Vc) by 15% but maintain a high feed rate. This grade is designed to handle the pressure and will often stabilize under a heavier chip load.
Packaging: 10 pieces per box.
Korloy MGMN300-G price, 3mm tough grooving insert for interrupted cut, NC3030 vs NC3020 for steel grooving, heavy duty parting insert for CNC lathe, 3.0mm width grooving tip for alloy steel
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.