Korloy MGMN250-G PC9030 2.5mm Double-Ended Grooving Insert for Stainless Steel (10pcs)
Price shown is a starting point. Contact us for a precise quote based on your requirements.
The Original Korloy MGMN250-G PC9030 is a high-performance 2.5mm Double-Ended Grooving Insert engineered specifically for the rigorous demands of Stainless Steel and Heat-Resistant Alloys. When precision and material economy are equally important, the 2.5mm intermediate width provides superior stability over narrower inserts. The PC9030 PVD grade features an ultra-smooth nano-structure TiAlN coating that prevents material welding (built-up edge) and ensures a superior surface finish on gummy materials like 304, 316, and Duplex stainless steels.
The Stainless Solution: Stainless steel machining is notorious for work-hardening and excessive heat. The PC9030 grade is optimized with a sharp edge geometry and heat-resistant PVD coating to slice through work-hardened layers while maintaining tool integrity in deep grooves.
Technical Specifications:
| Brand | Korloy (100% Genuine) |
| ISO Code | MGMN250-G |
| Insert Width (w) | 2.5 mm |
| Grade | PC9030 (Premium PVD for Stainless) |
| Chipbreaker | -G (Reinforced Edge Geometry) |
Core Performance Benefits:
- Exceptional Kerf Control: The 2.5mm width offers significantly more rigidity than 1.5/2.0mm inserts, reducing tool deflection in deep radial cuts.
- Built-Up Edge Resistance: Specialized PVD coating minimizes friction, preventing the "sticking" effect common with stainless and low-carbon steels.
- Extended Tool Life: High thermal stability allows for consistent performance even during long-cycle parting-off of large diameter bars.
- Double-Ended Economy: Features two precision cutting edges to maximize your investment and reduce tool change downtime.
Recommended Cutting Parameters:
| Material Group | Cutting Speed (Vc) | Feed Rate (f) |
|---|---|---|
| Stainless Steel (304/316) | 80 - 150 m/min | 0.05 - 0.13 mm/rev |
| High-Temp Alloys (Inconel) | 25 - 55 m/min | 0.04 - 0.09 mm/rev |
| Mild Sticky Steel | 100 - 180 m/min | 0.06 - 0.15 mm/rev |
Compatible Tool Holders:
Pairs perfectly with dedicated 2.5mm width MGEHR/L external holders:
- External Holders: MGEHR 1616-2.5 / 2020-2.5 / 2525-2.5
Strategic Tip: PC9030 vs. NC3120
While both can cut steel, the coating technology defines their best use:
The Stainless Expert. PVD coating. Thinner and sharper. Best for materials that "stick" or work-harden easily. Essential for 300-series stainless.
The Steel Experts. CVD coating. Thicker and better for high-speed heat resistance in standard carbon and alloy steels.
Machinist's Pro Tip: For the MGMN250-G PC9030, when grooving stainless steel, avoid dwelling at the bottom of the cut. The 2.5mm blade is strong, but heat builds up quickly in SS—ensure your coolant flow is aggressive and aimed directly at the cutting edge.
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.