Korloy MGMN300-M NC3030 3mm Double-Ended Tough Steel Grooving Insert (10pcs)
Price shown is a starting point. Contact us for a precise quote based on your requirements.
The Original Korloy MGMN300-M NC3030 is a high-performance 3.0mm Double-Ended Grooving Insert specifically engineered for Steel Machining under Challenging Conditions. In operations where mechanical shock is unavoidable—such as interrupted cuts, heavy scale, or older machine setups—the NC3030 CVD grade excels. Its robust carbide substrate and multi-layer coating provide the ultimate defense against edge chipping and sudden tool failure.
Engineered for Toughness: The 3.0mm width combined with the NC3030 grade offers a high safety margin during deep parting-off of solid steel bars. It is the go-to solution for machinists facing "crunching" or edge breakage with more brittle grades.
Technical Specifications:
| Brand | Korloy (100% Genuine) |
| ISO Code | MGMN300-M |
| Insert Width (w) | 3.0 mm |
| Grade | NC3030 (Heavy-Duty CVD Coated Steel Grade) |
| Chipbreaker | -M (Stable Medium-Cutting Geometry) |
Core Performance Benefits:
- Interrupted Cut Stability: Designed to handle cross-holes, keyways, and hex bars without micro-chipping.
- Advanced CVD Coating: Thick thermal barrier protects the edge during heavy-duty parting-off in high-carbon steels.
- Maximum Rigidity: The 3.0mm width ensures the tool stays vertical in deep radial cuts, preventing "walking" or coning.
- Double-Ended ROI: Two usable edges provide maximum cost-efficiency for general-purpose workshop use.
Recommended Cutting Parameters:
| Material Group | Cutting Speed (Vc) | Feed Rate (f) |
|---|---|---|
| Mild Steel (Low Carbon) | 100 - 190 m/min | 0.08 - 0.20 mm/rev |
| Alloy Steel (4140/4340) | 80 - 160 m/min | 0.06 - 0.18 mm/rev |
| Cast Steel / Forgings | 70 - 140 m/min | 0.08 - 0.15 mm/rev |
Compatible Tool Holders:
Fits all standard 3.0mm MGEHR/L (External) and MGIVR (Internal) tool bars:
- External Holders: MGEHR 1616-3 / 2020-3 / 2525-3
- Internal Holders: MGIVR 2016-3 / 2520-3
Choosing Your Defense: NC3030 vs. NC3120
For 3.0mm steel grooving, your choice should match your setup stability:
The Tough Shield. Use for interrupted cuts (hex, keyways) or manual lathes. Prioritizes anti-breakage. Best for low to medium speeds.
The Speed Specialist. Best for continuous CNC cuts and higher RPMs. Offers better wear resistance but is more sensitive to sudden impacts.
Machinist's Pro Tip: If your MGMN300-M NC3030 is holding up well but wearing out slowly, you are in the right spot. If the edge is "snapping" during the cut, check your tool center height—being too low is the #1 reason for breakage in tough grades like NC3030.
Packaging: 10 pieces per box.
Korloy MGMN300-M NC3030 price, 3mm insert for interrupted steel parting, MGMN300-M speeds and feeds for carbon steel, NC3030 vs NC3120 comparison, tough 3.0mm grooving insert for CNC
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.