Korloy CNMG190616-GR NC3030 Ultimate Heavy Roughing Insert, R1.6 (10pcs)
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The Original Korloy CNMG190616-GR NC3030 (ANSI Standard: CNMG 644) is the most robust turning insert in the Korloy catalog, specifically engineered for extreme stock removal in the most difficult steel machining environments. This "giant-scale" insert features a 1.6mm (1/16") nose radius, providing maximum edge reinforcement to withstand violent impacts and high-pressure feeding. The NC3030 grade is Korloy's premier choice for toughness, offering elite resistance to chipping and thermal cracking, making it indispensable for large-diameter forgings and heavy interrupted cuts.
The Heavy-Duty Standard: For massive workpieces where a single tool failure could lead to costly rework, the CNMG190616-GR NC3030 provides the process security needed to plow through uneven surfaces and raw forge skin.
Technical Specifications:
| Brand | Korloy (100% Genuine) |
| ISO Code | CNMG190616-GR |
| ANSI Code | CNMG 644 |
| Grade | NC3030 (Ultimate Toughness CVD Coating) |
| Nose Radius | 1.6 mm (Maximum Edge Security) |
Core Performance Benefits:
- Indestructible Edge: The R1.6 radius provides the largest possible contact area, effectively distributing heat and mechanical force to prevent edge fracture.
- Heavy Roughing Geometry: The GR chipbreaker is designed with a wide, reinforced land to handle massive depths of cut (ap) and large chips.
- Elite Shock Resistance: NC3030 substrate is optimized to absorb high-frequency vibrations and the repetitive shocks of interrupted cutting.
- Maximum Productivity (MRR): Allows for aggressive feed rates, significantly reducing cycle times on large shafts and thick-walled steel components.
Recommended Cutting Parameters:
| Application Scenario | Cutting Speed (Vc) | Feed Rate (f) | Depth of Cut (ap) |
|---|---|---|---|
| Heavy Interrupted Cutting | 70 - 160 m/min | 0.40 - 0.75 mm/rev | 3.5 - 9.0 mm |
| Rough Forged Surface / Scale | 80 - 150 m/min | 0.45 - 0.90 mm/rev | 4.0 - 10.0 mm |
| Continuous Heavy Roughing | 100 - 190 m/min | 0.50 - 1.05 mm/rev | 4.0 - 11.5 mm |
Compatible Tool Holders:
To support the immense forces generated by this insert, we recommend 32mm or 40mm shank holders:
- External Turning: PCLNR/L 3232P19 / PCLNR/L 4040R19
Roughing Pro-Tip: R1.2 vs. R1.6
Choosing the right radius for heavy-duty steel machining:
Best for maximum feed rates and extreme impact. The R1.6 is much more resistant to chipping when hitting forge scale, but requires high machine horsepower.
A versatile roughing choice. It creates less radial pressure than the R1.6, making it better for machines with lower spindle torque or slightly less rigid setups.
Machinist's Insight: In the heavy-duty world of CNMG 1906, the NC3030 grade is your best insurance policy. It survives the "shock" that would shatter efficiency-focused grades like NC3020.
Packaging: 10 pieces per box.