Korloy FGD300R-03 NC3020 3mm Single-Ended Grooving & Parting Insert (10pcs)
Price shown is a starting point. Contact us for a precise quote based on your requirements.
The Original Korloy FGD300R-03 NC3020 is a specialized Single-Ended Parting and Grooving Insert engineered for maximum rigidity in Steel (P) machining. Unlike double-ended inserts that can suffer from seat instability during deep cuts, the FGD's single-ended design provides a much stronger clamping surface. This makes it the premier choice for Deep Grooving and Large Diameter Parting. Combined with the NC3020 CVD coating, it delivers elite wear resistance and thermal stability for high-speed CNC production of Carbon and Alloy Steels.
Rigidity for Deep Cuts: The FGD's single-ended architecture is purposely built to prevent vibration. When your application requires deep penetration into steel workpieces, this insert maintains its edge position better than dual-ended alternatives, ensuring superior surface finish and dimensional accuracy.
Technical Specifications:
| Brand | Korloy (100% Genuine) |
| ISO Code | FGD300R-03 |
| Insert Design | Single-Ended (Maximum Stability) |
| Width (w) | 3.0 mm |
| Grade | NC3020 (Advanced CVD for Steel) |
Core Performance Benefits:
- Single-Ended Advantage: Eliminates the risk of the "back-end" edge rubbing in deep grooves, providing more security during heavy parting-off operations.
- Precision Chip Breaking: The FGD geometry efficiently narrows the chip, preventing it from binding or marring the side walls of the groove.
- Thermal Shield: The NC3020 CVD coating allows for high surface speeds (Vc), reducing cycle times in mass production environments.
- Optimized R0.3 Radius: Provides excellent corner strength while allowing for sharp, clean groove profiles.
Recommended Cutting Parameters:
| Material Group | Cutting Speed (Vc) | Feed Rate (f) |
|---|---|---|
| Carbon Steel (1045) | 140 - 240 m/min | 0.07 - 0.18 mm/rev |
| Alloy Steel (4140/SCM440) | 110 - 190 m/min | 0.05 - 0.14 mm/rev |
| Free-Cutting Steel | 160 - 260 m/min | 0.08 - 0.20 mm/rev |
Compatible Tool Holders:
Must be used with Korloy FGD-specific tool blocks:
- External Grooving Holders: FGDR / FGDR 2020-3 / 2525-3
The Single-End Logic: FGD vs. MGMN
Why choose a single-ended FGD insert for your steel work?
Best for Stability & Depth. The long insert body provides a massive seating area, preventing the tool from twisting during deep grooving or heavy steel parting.
Best for General Utility. While cost-effective due to two edges, MGMN inserts can struggle with vibration in deep parting or high-tensile steels where FGD excels.
Machinist's Pro Tip: For deep parting (over 20mm), the FGD single-end is far more secure. Always ensure your tool is set exactly to the center height—even 0.1mm above or below can lead to premature edge wear in steel.
Packaging: 10 pieces per box.
Korloy FGD300R single end insert, 3mm parting off tool for large diameter steel, deep grooving insert NC3020, Korloy FGD vs MGMN, CVD coated grooving tips for carbon steel
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.