Korloy FGM400R-04 NC3030 4mm Multi-Functional Grooving & Side-Turning Insert (10pcs)
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The Original Korloy FGM400R-04 NC3030 is a high-performance Multi-Functional Grooving Insert designed for heavy-duty Side-Turning, Grooving, and Parting-off in Steel (P) applications. With a robust 4.0mm width and 0.4mm corner radius, this insert allows you to combine multiple turning operations into one tool, drastically reducing tool change time and turret space requirements. The NC3030 CVD coating provides exceptional toughness, making it the preferred choice for machining steel forgings, parts with interrupted surfaces, or unstable setups.
Maximize Productivity: The FGM geometry is specifically reinforced for axial forces. This means you can plunge (groove) and then move horizontally (turn) to clear material in a single continuous path, ensuring a seamless surface finish and high efficiency.
Technical Specifications:
| Brand | Korloy (100% Genuine) |
| ISO Code | FGM400R-04 |
| Design Type | Multi-Functional (Groove + Turn) |
| Width (w) | 4.0 mm |
| Grade | NC3030 (Tough CVD Coating for Steel) |
Core Performance Benefits:
- Engineered for Side-Loading: The FGM body is reinforced to resist deflection when moving laterally, maintaining tight tolerances.
- CVD NC3030 Coating: Features a high-toughness substrate that effectively prevents chipping during heavy interrupted cutting or when hitting scale.
- Superior Chip Breaking: The FGM chipbreaker curls chips efficiently during both plunging and longitudinal turning, preventing "chip wrap" on the workpiece.
- Versatile Application: Perfect for creating wide grooves, shoulders, and complex profiles in carbon, alloy, and tool steels.
Recommended Cutting Parameters:
| Process | Cutting Speed (Vc) | Feed Rate (f) |
|---|---|---|
| Radial Grooving | 90 - 170 m/min | 0.07 - 0.18 mm/rev |
| Side-Turning | 110 - 190 m/min | 0.12 - 0.30 mm/rev |
| Parting-off | 80 - 150 m/min | 0.05 - 0.15 mm/rev |
Compatible Tool Holders:
To perform side-turning safely, this insert must be used with the FGMR series holders:
- Multi-Functional Holders: FGMR 2020-4 / FGMR 2525-4 / FGMR 3232-4
The Multi-Tasking Guide: FGM vs. FGD
Why choose FGM over the standard FGD parting insert?
Designed for Multi-Directional work. Choose this if you need to turn a profile or widen a groove after plunging. It is the most versatile 4mm grooving tool in the Korloy lineup.
Designed for Straight Plunging. Excellent for simple cut-offs, but the body is not reinforced for lateral movement. Turning with an FGD will result in tool failure.
Machinist's Pro Tip: For 4mm FGM inserts, always check your center height. Being even slightly off-center will create excessive rubbing during side-turning, leading to poor surface finish and premature grade wear in NC3030.
Packaging: 10 pieces per box.
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.