Korloy FMM300R-03 NC3030 3mm Single-Ended Multi-Functional Grooving Insert (10pcs)
Price shown is a starting point. Contact us for a precise quote based on your requirements.
The Original Korloy FMM300R-03 NC3030 is a high-performance Single-Ended Multi-Functional Insert designed for Grooving, Side-Turning, and Parting-off. Unlike double-ended inserts that are limited by depth, the single-ended FMM design provides maximum seating stability and allows for Deeper Grooving operations in Steel (P). The NC3030 CVD coating is the ultimate choice for toughness, engineered to handle interrupted cuts and the thermal shocks of medium-speed machining in carbon and alloy steels.
Single-Ended Stability: The FMM's single-end architecture allows for a longer, more secure clamping surface within the holder. This rigidity is essential when transitioning from a radial plunge (grooving) to an axial move (side-turning), ensuring high precision and preventing tool chatter.
Technical Specifications:
| Brand | Korloy (100% Genuine) |
| ISO Code | FMM300R-03 |
| Insert Design | Single-Ended (High Rigidity) |
| Width (w) | 3.0 mm |
| Grade | NC3030 (Heavy-Duty CVD for Steel) |
Core Performance Benefits:
- Multi-Tasking Excellence: Seamlessly perform plunging and longitudinal turning without changing tools, maximizing turret efficiency.
- Single-End Rigidity: Superior to double-ended tools for deep-reaching grooves where tool deflection must be minimized.
- NC3030 Impact Strength: The advanced CVD coating prevents premature edge chipping even when machining rough castings or hex bars.
- Advanced Chip Control: Specialized M-type chipbreaker geometry ensures smooth chip evacuation in both radial and axial cutting directions.
Recommended Cutting Parameters:
| Operation | Cutting Speed (Vc) | Feed Rate (f) |
|---|---|---|
| Grooving (Radial) | 100 - 180 m/min | 0.05 - 0.15 mm/rev |
| Side-Turning (Axial) | 120 - 200 m/min | 0.10 - 0.25 mm/rev |
| Parting-off | 90 - 160 m/min | 0.04 - 0.10 mm/rev |
Compatible Tool Holders:
Must be used with FMM-specific tool blocks for multi-directional support:
- External Holders: FMMR / FMML 2020-3 / 2525-3
The Single-End Logic: FMM vs. FGD
Korloy offers different single-ended geometries for specific turning strategies:
Best for Grooving + Side Turning. The chipbreaker and edge prep are optimized for lateral movement. Use this when you need to profile after plunging.
Best for Straight Parting & Grooving. It excels in vertical stability but is not designed for significant horizontal movement.
Machinist's Pro Tip: For the best side-turning results with FMM300R, ensure your coolant pressure is high. This helps "wash" the chips out of the groove during lateral movement, preventing them from being re-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.