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.