Korloy MGMN300-G CN2000 3mm Double-Ended Cermet Insert for High-Precision Steel Finishing (10pcs)
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The Original Korloy MGMN300-M CN2000 is a specialized 3.0mm Double-Ended Cermet Insert engineered for the most demanding Finishing and High-Speed Machining applications. By utilizing the CN2000 Cermet grade—a titanium-based ceramic-metal composite—this insert offers superior chemical stability and crater wear resistance compared to traditional carbide. The -M (Medium-Finishing) chipbreaker is precision-ground to provide excellent chip control at lighter depths of cut, ensuring a flawlessly smooth, mirror-like surface on steel and cast iron components.
Why Choose Cermet? CN2000 excels where carbide struggles. Its high resistance to thermal deformation and low material adhesion make it ideal for high-velocity finishing, effectively eliminating built-up edge and surface clouding.
Technical Specifications:
| Brand | Korloy (100% Genuine) |
| ISO Code | MGMN300-M |
| Insert Width (w) | 3.0 mm |
| Grade | CN2000 (Premium Cermet) |
| Surface Effect | Mirror Finish / High Gloss |
Core Performance Benefits:
- "Grinding-Free" Finish: Achieve surface roughness (Ra) values that often remove the need for secondary grinding operations.
- Exceptional Edge Sharpness: The ground -M geometry stays sharp longer in finishing conditions, reducing cutting pressure on delicate workpieces.
- Extreme Heat Resistance: Cermet's ceramic properties allow it to operate at much higher RPMs than coated carbide, increasing productivity.
- Extended Dimensional Life: Minimal tool wear during finishing passes ensures consistent part size across large production batches.
Recommended Cutting Parameters:
| Material Group | Cutting Speed (Vc) | Feed Rate (f) |
|---|---|---|
| Carbon Steel (Finishing) | 160 - 320 m/min | 0.05 - 0.15 mm/rev |
| Alloy Steel (4140/4340) | 140 - 280 m/min | 0.04 - 0.12 mm/rev |
| Cast Iron (Grey/Ductile) | 180 - 400 m/min | 0.08 - 0.18 mm/rev |
Compatible Tool Holders:
Fits all standard 3.0mm MGEHR/L and MGIVR tool holders:
- External Holders: MGEHR 1616-3 / 2020-3 / 2525-3
- Internal Holders: MGIVR 2016-3 / 2520-3
The Finishing Choice: Cermet (CN2000) vs. Coated Carbide (NC3120)
At the 3.0mm width, using the right material for the right stage is vital:
The Finishing Expert. Optimized for high-speed finishing and mirror surfaces. Best for final dimensions. Use it where appearance and precision matter most.
The Roughing Expert. Higher toughness for heavy grooving, interrupted cuts, and general removal. Better for shock resistance but lacks the high-gloss finish of cermet.
Machinist's Pro Tip: Cermet tools like the MGMN300-M CN2000 perform best when "pushed." If you see a dull finish or vibrating marks, try increasing your cutting speed. However, never use cermet for interrupted cuts or heavy scale—it is a precision instrument, not a sledgehammer!
Packaging: 10 pieces per box.
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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.