Korloy MGMN400-G NC3030 4mm Double-Ended Heavy-Duty Grooving Insert (10pcs)
Price shown is a starting point. Contact us for a precise quote based on your requirements.
The Original Korloy MGMN400-G NC3030 is a heavy-duty 4.0mm Double-Ended Grooving Insert engineered for Maximum Stability and Impact Resistance. Designed for larger components and deep grooving tasks, the 4.0mm width provides an exceptionally rigid cutting edge that minimizes vibration during heavy-load operations. Combined with the NC3030 high-toughness CVD grade, this insert is the premier choice for machining steel in the most demanding conditions, including interrupted cuts and forged surfaces.
Built for Heavy Impacts: The NC3030 grade features a reinforced carbide substrate with a specialized CVD coating that effectively prevents crack propagation. It is specifically optimized to handle the mechanical shocks of interrupted cutting in carbon and alloy steels.
Technical Specifications:
| Brand | Korloy (100% Genuine) |
| ISO Code | MGMN400-G |
| Insert Width (w) | 4.0 mm |
| Grade | NC3030 (Ultra-Tough CVD Coating) |
| Chipbreaker | -G (Strong Reinforced Edge) |
Core Performance Benefits:
- Maximum Edge Strength: The 4mm wide body allows for aggressive feed rates while resisting the bending forces of deep radial plunging.
- Shock Absorption: NC3030 grade provides a "cushion" effect during interrupted cuts, significantly reducing the risk of catastrophic insert failure.
- Double-Ended Cost Efficiency: Two usable cutting edges help lower your tooling expenses in high-volume production.
- Optimized Chip Evacuation: The -G geometry is designed to narrow the chip slightly, allowing it to exit deep 4mm grooves without damaging the sidewalls.
Recommended Cutting Parameters:
| Workpiece Type | Cutting Speed (Vc) | Feed Rate (f) |
|---|---|---|
| Carbon Steel (General) | 100 - 180 m/min | 0.10 - 0.25 mm/rev |
| Alloy Steel (Interrupted) | 80 - 150 m/min | 0.08 - 0.20 mm/rev |
| Steel Forgings / Scale | 70 - 130 m/min | 0.08 - 0.18 mm/rev |
Compatible Tool Holders:
Must be used with standard 4.0mm MGEHR/L external grooving holders:
- External Holders: MGEHR 2020-4 / 2525-4 / 3232-4
The 4.0mm Heavy-Duty Logic: NC3030 vs. NC3020
At 4mm width, vibration management is the key to tool life:
The Reliability Expert. Choose this if your part has cross-holes, splines, or if you are using an older lathe. It prioritizes toughness to prevent snapping.
The Wear Expert. Choose this for high-speed, smooth, continuous cutting on stable, high-precision machines to maximize production speed.
Machinist's Pro Tip: When using the MGMN400-G for parting large diameter solid bars, ensure the coolant flow is high-pressure and directed into the groove. As the groove deepens, the NC3030's thermal stability becomes critical to avoid heat-induced edge deformation.
Packaging: 10 pieces per box.
Korloy MGMN400-G price, 4mm width grooving insert for steel, heavy duty parting tool for CNC lathe, NC3030 vs NC3020 for 4mm grooving, best insert for large diameter steel parting
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.