Korloy CNMG190612-GR NC3030 Heavy-Duty Roughing Insert for Interrupted Cuts (10pcs)
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The Original Korloy CNMG190612-GR NC3030 (ANSI Standard: CNMG 643) is the industry standard for reliable roughing of large-scale steel components. Built on a massive 19mm edge platform with 6.35mm thickness, this insert is designed to survive where others shatter. The GR chipbreaker features a high-strength T-land for extreme edge reinforcement, while the NC3030 grade—Korloy’s toughest CVD coating—provides maximum resistance against mechanical shock and thermal cracking during heavy interrupted cuts or when machining parts with hard forged skin.
Ultimate Process Security: For large, expensive workpieces in the energy, marine, and mining industries, the CNMG190612-GR NC3030 offers the peace of mind that your insert will handle interruptions and scale without catastrophic failure.
Technical Specifications:
| Brand | Korloy (100% Genuine) |
| ISO Code | CNMG190612-GR |
| ANSI Code | CNMG 643 |
| Grade | NC3030 (Maximum Toughness for Interrupted Cuts) |
| Chipbreaker | GR (Heavy-Duty Roughing) |
Core Performance Benefits:
- Shock Absorption: The specialized NC3030 substrate is optimized to prevent chipping even during the most violent interrupted cuts.
- Deep Depth of Cut: The GR geometry effortlessly manages large depths of cut (ap), making it ideal for bulk material removal.
- Thermal Stability: Thick Al2O3 CVD coating allows the insert to withstand the high heat generated during heavy roughing on large diameters.
- Massive Rigidity: The oversized 19mm size provides a large seating area, ensuring the insert stays locked in place under extreme cutting pressures.
Recommended Cutting Parameters:
| Material Group | Cutting Speed (Vc) | Feed Rate (f) | Depth of Cut (ap) |
|---|---|---|---|
| Heavy Interrupted Steel | 80 - 180 m/min | 0.30 - 0.65 mm/rev | 3.0 - 9.0 mm |
| Steel Forgings / Scale | 90 - 160 m/min | 0.35 - 0.70 mm/rev | 4.0 - 10.0 mm |
| Standard Alloy Steel | 110 - 210 m/min | 0.35 - 0.75 mm/rev | 4.0 - 11.0 mm |
Compatible Tool Holders:
For heavy-duty roughing, high-clamping force is mandatory. We recommend using 32mm shank or larger holders:
- External Turning: PCLNR/L 3232P19 / PCLNR/L 4040R19
Steel Grade Selection: NC3030 vs. NC3020
Choosing the right protection for your heavy-duty steel inserts:
Best for unstable setups, heavy interruptions, and rough surfaces. It is the "safety first" grade that prevents chipping at the cost of some cutting speed.
Best for continuous high-speed roughing on clean surfaces. It provides superior wear resistance for maximizing output on stable parts.
Machinist's Insight: When machining large forgings where you aren't sure of the surface quality, start with NC3030. Once the surface is clean and the cut is continuous, you can switch to NC3020 for higher speeds.
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.