Korloy MGGN300-02-M CN20 3mm Double-Ended Cermet Grooving Insert for Finishing (10pcs)
Price shown is a starting point. Contact us for a precise quote based on your requirements.
The Original Korloy MGGN300-02-M CN20 is a high-precision Double-Ended Multi-Functional Insert designed for Grooving, Profiling, and Finishing operations. Featuring the CN20 Cermet grade, this insert is the ultimate choice for machinists requiring a mirror-like surface finish and tight dimensional tolerances in Steel (P) and Cast Iron (K). The double-ended design maximizes cost-efficiency by providing two sharp cutting edges per insert, while the -M chipbreaker ensures stable chip control during both radial plunging and axial turning.
The Cermet Advantage: Unlike carbide, the CN20 cermet grade has a low chemical affinity with steel, which drastically reduces "Built-up Edge" (BUE). This results in exceptional surface integrity and longer tool life during high-speed finishing cycles.
Technical Specifications:
| Brand | Korloy (100% Genuine) |
| ISO Code | MGGN300-02-M |
| Material | CN20 (Uncoated Cermet) |
| Width (w) | 3.0 mm |
| Corner Radius | 0.2 mm |
Core Performance Benefits:
- Mirror-Finish Results: Cermet's high wear resistance and sharp edge retention make it perfect for finishing passes where surface quality is critical.
- Double-Ended Economy: Two usable edges per insert significantly lower your cost-per-part compared to single-ended alternatives.
- Excellent Thermal Resistance: CN20 maintains its hardness at high temperatures, allowing for stable high-speed machining without coolant if necessary.
- Stable Profiling: The M-type chipbreaker is optimized for multi-directional cutting, preventing chip entanglement during side-turning moves.
Recommended Cutting Parameters:
| Material Group | Cutting Speed (Vc) | Feed Rate (f) |
|---|---|---|
| Low Carbon Steel | 150 - 300 m/min | 0.05 - 0.15 mm/rev |
| Alloy Steel | 120 - 250 m/min | 0.05 - 0.12 mm/rev |
| Grey Cast Iron | 100 - 220 m/min | 0.08 - 0.18 mm/rev |
Compatible Tool Holders:
MGGN inserts fit standard MGEHR/L type external grooving holders:
- External Holders: MGEHR 2020-3 / MGEHR 2525-3
Cermet Tip: CN20 vs. NC3030 (Carbide)
When to choose Cermet (CN20) over traditional Carbide?
Best for Finishing. Choose this for high-speed, stable cuts where you need a beautiful surface finish. Not recommended for heavy interrupted cuts or roughing.
Best for Roughing & Toughness. Choose this for interrupted cuts, heavy loads, and low-to-medium speeds in steel.
Machinist's Pro Tip: Cermet is more brittle than carbide. Avoid using MGGN300 CN20 on workpieces with heavy scale or significant interruptions. For best results, use it as a dedicated finishing tool after a roughing pass with a carbide insert.
Packaging: 10 pieces per box.
Korloy MGGN300-02-M price, cermet grooving insert for steel finishing, 3mm double ended profiling insert, CN20 cermet grade properties, best insert for mirror finish grooving
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.