Korloy MGMN300-T PC5300 3mm Double-Ended Universal Tough Grooving Insert (10pcs)
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The Original Korloy MGMN300-T PC5300 is a heavy-duty 3.0mm Double-Ended Grooving Insert engineered for extreme reliability in interrupted cutting. While the standard 3.0mm inserts may struggle with shock loads, the -T (Tough) geometry features a reinforced cutting edge that absorbs impacts without chipping. Combined with the PC5300 PVD grade, this insert provides a universal solution for machining steel, stainless, and cast iron under the most unstable conditions.
The Interruption Specialist: MGMN300-T is the "problem solver" for 3.0mm grooves. If you are machining parts with cross-holes, keyways, or uneven surfaces (like rough castings), the reinforced edge profile of the -T geometry prevents the premature failure common in sharper inserts.
Technical Specifications:
| Brand | Korloy (100% Genuine) |
| ISO Code | MGMN300-T |
| Insert Width (w) | 3.0 mm (+/- 0.02) |
| Grade | PC5300 (Universal High-Toughness PVD) |
| Chipbreaker | -T (Reinforced / Heavy Duty) |
Core Performance Benefits:
- Anti-Chipping Geometry: The -T land angle is optimized to protect the cutting edge from micro-fractures during impact.
- Universal Substrate: PC5300 handles a massive variety of materials, making it the perfect choice for diverse job-shop environments.
- 3.0mm High Rigidity: Standard 3.0mm width ensures compatibility with a vast range of holders while providing enough body to dissipate heat.
- Sub-micron PVD Coating: Offers excellent resistance to oxidation and wear, extending tool life in alloy steels.
Recommended Cutting Parameters:
| Material Group | Cutting Speed (Vc) | Feed Rate (f) |
|---|---|---|
| Carbon Steel / Alloy Steel | 100 - 170 m/min | 0.08 - 0.20 mm/rev |
| Cast Iron (GG/GGG) | 80 - 150 m/min | 0.10 - 0.22 mm/rev |
| Stainless Steel (Austenitic) | 70 - 130 m/min | 0.06 - 0.15 mm/rev |
Compatible Tool Holders:
Universal 3.0mm seat size. Pairs perfectly with these standard holders:
- External Holders: MGEHR 1616-3 / 2020-3 / 2525-3
- Internal Holders: MGIVR 2016-3 / 2520-3
The Tough Choice: MGMN300-T vs. MGMN300-M
At 3.0mm width, the chipbreaker geometry makes a huge difference in edge security:
The Shield. It has a blunt, reinforced land to handle heavy shocks. If you have a keyway or an interrupted cut, this is the only choice to prevent snapping.
The Generalist. Sharper than the -T, offering better chip breaking and lower cutting forces in continuous, clean cuts of steel and stainless.
Machinist's Pro Tip: For MGMN300-T PC5300, if you are machining through a keyway, reduce your cutting speed ($Vc$) by 20% but maintain a steady feed ($f$). This utilizes the strength of the -T edge to plow through the interruption without creating thermal stress.
Packaging: 10 pieces per box.
Korloy MGMN300-T PC5300 technical data, 3.0mm insert for interrupted grooving, MGMN300-T vs MGMN300-M, best 3mm insert for scaly surface, PC5300 3mm grooving tool life
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.