Korloy MGMN250-T PC5300 2.5mm Double-Ended Universal Steel Grooving Insert (10pcs)
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The Original Korloy MGMN250-T PC5300 is a specialized 2.5mm Double-Ended Grooving Insert engineered for maximum edge toughness. When a 2.0mm insert is too fragile and a 3.0mm insert wastes too much material, the 2.5mm width provides the perfect middle ground for stability and efficiency. Featuring the -T (Tough) chipbreaker and the premium PC5300 PVD grade, this insert is the professional's choice for overcoming chipping in interrupted cuts and hardened steel applications.
Superior Edge Reinforcement: The MGMN250-T is designed with a more robust cutting edge compared to standard geometries. This makes it exceptionally resistant to the shock loads encountered when machining through holes, hex shafts, or scaly surfaces.
Technical Specifications:
| Brand | Korloy (100% Genuine) |
| ISO Code | MGMN250-T |
| Insert Width (w) | 2.5 mm (+/- 0.02) |
| Grade | PC5300 (Universal High-Toughness PVD) |
| Chipbreaker | -T (Reinforced for Toughness) |
Core Performance Benefits:
- Shock Absorption: The specialized substrate of PC5300 absorbs impacts, preventing micro-cracking in interrupted grooving.
- Balanced 2.5mm Profile: Offers better rigidity than 2.0mm inserts while maintaining high material economy.
- Thermal Stability: Advanced PVD coating protects the tool from heat buildup during heavy-duty cutting.
- Versatile Application: One grade for multiple materials, including Carbon Steel, Alloy Steel, and Stainless Steel.
Recommended Cutting Parameters:
| Material Group | Cutting Speed (Vc) | Feed Rate (f) |
|---|---|---|
| Carbon Steel (P1-P3) | 100 - 180 m/min | 0.06 - 0.15 mm/rev |
| Alloy Steel (40Cr/42CrMo) | 80 - 150 m/min | 0.05 - 0.12 mm/rev |
| Stainless Steel (304/316) | 70 - 130 m/min | 0.04 - 0.10 mm/rev |
Compatible Tool Holders:
For high-rigidity setup with 2.5mm inserts, use the following holders:
- External Holders: MGEHR 1616-2.5 / 2020-2.5 / 2525-2.5
The 2.5mm Advantage: MGMN250-T vs. 2.0mm Inserts
Why switch to a 2.5mm MGMN250-T from a standard 2.0mm insert?
The Toughness Specialist. The extra 0.5mm width and reinforced -T geometry significantly increase tool life in deep radial grooves or when cutting across holes. It stops the "snapping" common in 2.0mm widths.
The Material Savers. While they minimize kerf loss, they often lack the structural strength for high-torque applications or heavy interrupted cuts in tough alloys.
Machinist's Pro Tip: For MGMN250-T PC5300, if you encounter tool vibration, try increasing the feed rate ($f$) slightly. This forces the tool to "bite" into the material, utilizing the reinforced -T edge to stabilize the cut.
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.