Korloy CNMG160616-GR NC3030 Heavy-Duty Roughing Insert (10pcs)
30-Day Free Returns
Free Worldwide Shipping
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.