Korloy CNMG160616-GR NC3030 Heavy-Duty Roughing Insert (10pcs)
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The Original Korloy CNMG160616-GR NC3030 (ANSI Standard: CNMG 544) is the heavy-duty specialist in the Korloy turning lineup. This insert is specifically engineered for the most demanding steel roughing applications where tool security is the top priority. Featuring a massive 1.6mm (1/16") nose radius and an extra-thick 6.35mm body, it offers unparalleled resistance to edge fracture. The NC3030 grade provides the maximum toughness required to survive heavy interruptions, irregular surfaces, and forged scales on carbon and alloy steels.
Ultimate Edge Security: The combination of the GR (Heavy Roughing) chipbreaker and the NC3030 substrate makes this insert virtually indestructible during heavy-impact turning on large-scale workpieces.
Technical Specifications:
| Brand | Korloy (100% Genuine) |
| ISO Code | CNMG160616-GR |
| ANSI Code | CNMG 544 |
| Grade | NC3030 (Maximum Toughness CVD Coating) |
| Nose Radius | 1.6 mm (Extreme Roughing Strength) |
Core Performance Benefits:
- Maximum Impact Resistance: Optimized for heavy interrupted cuts that would shatter standard roughing grades.
- Extreme Feed Rates: The 1.6mm radius allows for high feed rates, maximizing the volume of material removed per minute (MRR).
- Reinforced Cutting Edge: GR geometry is designed with a strong T-land to prevent micro-chipping when hitting hard spots or forge scale.
- Thick CVD Coating: Provides a robust thermal barrier, allowing the tool to maintain integrity during high-heat, deep-cut operations.
Recommended Cutting Parameters:
| Application Type | Cutting Speed (Vc) | Feed Rate (f) | Depth of Cut (ap) |
|---|---|---|---|
| Heavy Interrupted Steel | 80 - 170 m/min | 0.35 - 0.70 mm/rev | 3.0 - 8.0 mm |
| Forged / Scaled Surfaces | 100 - 190 m/min | 0.40 - 0.85 mm/rev | 4.0 - 9.5 mm |
| Large Scale Carbon Steel | 110 - 220 m/min | 0.45 - 1.00 mm/rev | 4.0 - 10.0 mm |
Compatible Tool Holders:
Due to the massive forces generated by a 1.6mm radius roughing insert, heavy-duty 32mm+ shank holders are required:
- External Roughing:MCLNR2525M16 / MCLNR3232P16
The "Indestructible" Guide: NC3030 vs. NC3020
When to choose the ultimate toughness of NC3030:
Specifically for badly interrupted cuts and heavy scale. It prevents edge breakage where NC3020 would fail. Essential for safety on large, expensive parts.
Best for continuous heavy roughing. It lasts longer against wear but cannot handle the same level of impact as NC3030.
Machinist's Pro Tip: If your machine chatters under the load of this R1.6 insert, increase the feed rate (f) and reduce the cutting speed (Vc). This insert needs to "bite" deep into the material to 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.