Korloy SNMG150612-GR NC3020 General Purpose Steel Roughing Insert (10pcs)
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The Original Korloy SNMG150612-GR NC3020 is the premier choice for high-efficiency Steel (P-Group) roughing operations. This insert balances the massive stability of the 1506 thickness (6.35mm) with the high-speed performance of the NC3020 CVD Grade. Featuring a reinforced 1.2mm Corner Radius, it is designed for heavy-duty metal removal where both tool life and production speed are critical. The -GR (Roughing) chipbreaker provides exceptional chip breaking even at large depths of cut, ensuring a clean and safe machining environment.
High-Efficiency Production: NC3020 is engineered for speed. If your setup is stable and you need to maximize your cubic inches per minute (CIPM) in carbon or alloy steels, the NC3020 + GR combination offers the best balance of heat resistance and edge toughness.
Technical Specifications:
| Brand | Korloy (100% Genuine) |
| ISO Code | SNMG150612-GR |
| Corner Radius | 1.2 mm (Optimized for Feed & Life) |
| Substrate | NC3020 (Premium CVD for Steel) |
| Coating | Thick Al2O3 + TiCN CVD Layer |
Core Performance Benefits:
- Exceptional Wear Resistance: The NC3020 grade resists crater wear during high-velocity cutting, maintaining consistent tolerances.
- Enhanced Edge Security: 1.2mm radius dissipates cutting heat more effectively than smaller tips, preventing thermal deformation.
- Heavy-Duty GR Geometry: Wide land and aggressive rake angle ensure stable chip breaking in 5mm+ depth of cuts.
- Universal Steel Coverage: Highly effective across Mild Steel, Carbon Steel, and Alloy Steels like 4140 or 4340.
Recommended Cutting Parameters (High Efficiency Steel):
| Material Group | Cutting Speed (Vc) | Feed Rate (fn) | Depth of Cut (ap) |
|---|---|---|---|
| Low Carbon Steel (1018/1020) | 200 - 350 m/min | 0.35 - 0.75 mm/rev | 3.0 - 8.0 mm |
| Alloy Steel (4140/8620) | 160 - 280 m/min | 0.30 - 0.65 mm/rev | 2.5 - 7.0 mm |
| Continuous Heavy Cut | 180 - 300 m/min | 0.40 - 0.70 mm/rev | 4.0 - 8.0 mm |
Compatible Tool Holders:
Precision fit for ISO standard 15.875mm (5/8") IC holders:
- External Turning: MSSNR 2525M15 / 3232P15
Machinist Tip: NC3020 vs NC3030
Choosing the right CVD grade for your production line:
Speed King. Best for general manufacturing with stable machine setups. It handles higher RPMs and provides better wear resistance in continuous cuts, making it more productive for standard steel parts.
Toughness Champion. Switch to NC3030 only if you encounter heavy interruptions, scaly black skins, or unstable workholding. It is slower than NC3020 but harder to break.
Pro Advice: The 1.2mm radius on the SNMG150612-GR allows you to increase your feed rate without sacrificing too much surface finish. This "Sweet Spot" helps in managing the chip load and protecting the tool from premature flank wear.
Packaging: 10 pieces per box.
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