Korloy MGMN250-M PC215K 2.5mm Double-Ended Cast Iron Grooving Insert (10pcs)
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The Original Korloy MGMN250-M PC215K is a specialized 2.5mm Double-Ended Grooving Insert engineered for High-Reliability Cast Iron Machining. Designed for the K-group material spectrum, the PC215K PVD grade is the professional choice for Gray Iron (GG) and Ductile Iron (GGG). Its advanced coating technology and micro-grain carbide substrate are specifically combined to combat the abrasive wear and micro-chipping often encountered in cast iron components.
The 2.5mm Sweet Spot: MGMN250 provides significantly higher tool rigidity than 2.0mm inserts while maintaining a narrower kerf than 3.0mm models. In cast iron machining, this stability is crucial for maintaining tight tolerances and a smooth surface finish.
Technical Specifications:
| Brand | Korloy (100% Genuine) |
| ISO Code | MGMN250-M |
| Insert Width (w) | 2.5 mm |
| Grade | PC215K (Precision Cast Iron Specialist - PVD) |
| Chipbreaker | -M (Universal Stable Geometry) |
Core Performance Benefits:
- Exceptional Edge Toughness: Specialized PVD coating prevents the "peeling" of the cutting edge when hitting hard spots in castings.
- Optimized for Iron Alloys: Reduces the chemical-wear reaction between the tool and the workpiece material.
- Balanced Dimensions: 2.5mm width offers a perfect compromise between material savings and tool holder strength.
- Versatile PVD Protection: Superior performance in interrupted cuts compared to thicker CVD coatings.
Recommended Cutting Parameters:
| Material Group | Cutting Speed (Vc) | Feed Rate (f) |
|---|---|---|
| Gray Iron (HT200/GG20) | 110 - 210 m/min | 0.06 - 0.16 mm/rev |
| Ductile Iron (QT500/GGG50) | 90 - 170 m/min | 0.05 - 0.14 mm/rev |
| Chilled Cast Iron | 40 - 80 m/min | 0.04 - 0.10 mm/rev |
Compatible Tool Holders:
For best results, use dedicated 2.5mm MGEHR/L tool bars:
- External Holders: MGEHR 1616-2.5 / 2020-2.5 / 2525-2.5
Cast Iron Pro-Tip: PC215K vs. NC6210
Korloy provides two distinct technologies for K-group materials:
The Precision Blade. A PVD grade that is sharper and more impact-resistant. Best for 2.0mm-3.0mm width grooving where edge integrity and detail are key.
The Speed Specialist. A CVD grade with thick coatings. Best for 5.0mm+ widths and high-volume roughing where heat and abrasive wear resistance are the main concerns.
Machinist's Pro Tip: When using the MGMN250-M PC215K on cast iron, pay attention to the dust. Iron dust is highly abrasive; ensuring a consistent feed rate helps the -M chipbreaker carry the particles away from the tool-holder seat, preventing premature holder wear.
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.