Korloy CNMG190616-GR NC3120 Heavy Roughing Insert, R1.6 (10pcs)
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The Original Korloy CNMG190616-GR NC3120 (ANSI Standard: CNMG 644) is a titan of heavy-duty turning, engineered for extreme material removal on both Steel (P) and Cast Iron (K). This oversized "1906" series insert is built to withstand the most aggressive cutting forces in industrial environments. Featuring a massive 1.6mm (1/16") nose radius and the specialized GR (Heavy Roughing) geometry, it provides unparalleled edge stability. The NC3120 universal grade offers a versatile CVD coating that excels in stable to semi-stable conditions across multiple materials.
Maximum Edge Security: The R1.6 radius is the strongest configuration for the CNMG series. It distributes cutting pressure and heat across a larger surface area, preventing the edge failure common when roughing massive workpieces.
Technical Specifications:
| Brand | Korloy (100% Genuine) |
| ISO Code | CNMG190616-GR |
| ANSI Code | CNMG 644 |
| Grade | NC3120 (Universal Steel & Cast Iron) |
| Nose Radius | 1.6 mm (Ultimate Strength) |
Core Performance Benefits:
- Unmatched Stock Removal: Optimized for high Material Removal Rates (MRR), cutting cycle times in half for large-scale energy and marine components.
- Enhanced Universal Grade: NC3120 bridges the gap between high-speed steel turning and abrasive cast iron machining, reducing the need for constant tool changes.
- Thermal Shield: The thick CVD coating provides a robust barrier against thermal cracking during long continuous roughing passes.
- Extreme Feed Rates: The reinforced R1.6 geometry allows for aggressive feed rates without sacrificing tool integrity.
Recommended Cutting Parameters:
| Material Group | Cutting Speed (Vc) | Feed Rate (f) | Depth of Cut (ap) |
|---|---|---|---|
| Low Carbon Steel | 140 - 270 m/min | 0.45 - 1.05 mm/rev | 4.0 - 11.0 mm |
| Cast Iron (Gray/Ductile) | 130 - 240 m/min | 0.40 - 0.90 mm/rev | 3.5 - 9.5 mm |
| Alloy Steel (Pre-Machined) | 100 - 200 m/min | 0.35 - 0.75 mm/rev | 3.5 - 8.5 mm |
Compatible Tool Holders:
Due to the massive radial pressure of an R1.6 roughing insert, use only High-Clamping 19-series holders:
- External Turning: PCLNR/L 3232P19 / PCLNR/L 4040R19
The Heavy Duty Expert: NC3120 vs. NC3030
Which toughness level is right for your R1.6 CNMG 644?
Ideal for shops handling both Steel and Iron. It provides superior tool life in continuous cuts and higher wear resistance compared to NC3030.
Choose this for violent interrupted cuts or when machining rough-cast parts with heavy scale. It is the toughest steel grade available.
Machinist's Pro Tip: With the R1.6 radius, ensure your machine has the rigidity and horsepower to match. If vibration occurs, increase the feed rate (f) slightly to load the tool and stabilize the cut.
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.