Korloy MGMN400-04-L PC5300 4mm R0.4 Heavy-Duty Profiling Grooving Insert (10pcs)
Price shown is a starting point. Contact us for a precise quote based on your requirements.
The Original Korloy MGMN400-04-L PC5300 is a heavy-duty 4.0mm Double-Ended Profiling Insert engineered for maximum metal removal and edge security. Featuring a robust 0.4mm corner radius (R0.4) and the -L optimized lead geometry, this insert excels in lateral profiling, side-turning, and deep grooving where tool pressure and heat are intense. Powered by the PC5300 universal PVD grade, it is the ultimate choice for machining heavy shafts and structural components made of steel, stainless, or cast iron.
Engineered for Stability: The R0.4 corner radius provides a broader contact area, distributing cutting forces more evenly than sharper inserts. This makes the MGMN400-04-L exceptionally resistant to notch wear and edge chipping during aggressive profiling passes in tough materials like 316 Stainless or 4140 Alloy Steel.
Technical Specifications:
| Brand | Korloy (100% Genuine) |
| ISO Code | MGMN400-04-L |
| Insert Width / Radius | 4.0 mm / R0.4 |
| Grade | PC5300 (Universal High-Toughness PVD) |
| Primary Use | Heavy Profiling, Side-Turning, Radius Contouring |
Core Performance Benefits:
- High Feed Capacity: The R0.4 edge allows for faster feed rates compared to standard R0.2 profiles, significantly cutting down cycle times.
- Universal Material Mastery: PC5300 grade is the benchmark for versatility, excelling in Steel (P), Stainless (M), and High-Temp Alloys (S).
- Enhanced Tool Life: Advanced PVD coating maintains edge sharpness while protecting against thermal cracking during long finishing passes.
- Superior Rigidity: The 4.0mm body width combined with -L geometry minimizes chatter and deflection under heavy side-loading.
Recommended Cutting Parameters:
| Material Group | Cutting Speed (Vc) | Feed Rate (f) |
|---|---|---|
| Alloy Steel (40Cr/42CrMo) | 90 - 170 m/min | 0.10 - 0.22 mm/rev |
| Stainless Steel (Austenitic) | 70 - 130 m/min | 0.08 - 0.18 mm/rev |
| Ductile Cast Iron | 80 - 140 m/min | 0.12 - 0.25 mm/rev |
Compatible Tool Holders:
Precision fit for standard 4.0mm seat heavy-duty tool systems:
- External Holders: MGEHR 2525-4 / 3232-4 / 4040-4
- Internal Holders: MGIVR 3125-4 / 4032-4
Machinist Tip: Why R0.4 over R0.2 for 4mm?
When machining large grooves, the corner radius choice impacts both finish and tool cost:
The Heavy Pro-Filer. Better heat dissipation and impact resistance. Essential for tough alloys and stainless steels where R0.2 might suffer from premature edge wear.
The Precision Closer. Used only when the part drawing requires a very sharp 90-degree corner or a specific small radius. Requires more conservative feed rates.
Pro Secret: For MGMN400-04-L PC5300, the -L geometry allows for a technique called "Peck Profiling." By breaking the profile pass into small increments, you can achieve world-class chip control even in gummy stainless steels.
Packaging: 10 pieces per box.
Korloy MGMN400-04-L technical data, 4.0mm profiling insert with R0.4 radius, heavy duty 4mm grooving insert, MGMN400-04-L vs MGMN400-M, PC5300 4.0mm insert for stainless profiling
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.