Korloy SNMG150612-GR NC3030 Heavy-Duty Roughing Insert for Interrupted Steel (10pcs)
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The Original Korloy SNMG150612-GR NC3030 is a powerhouse Double-Sided Square Turning Insert engineered for the most aggressive Steel (P-Group) machining. With a robust 1.2mm Corner Radius and the heavy-duty 1506 thickness (6.35mm), this insert is built for maximum metal removal rates (MRR) and incredible impact resistance. The NC3030 CVD Grade is Korloy’s toughest solution for interrupted cuts, forged surfaces, and unstable machining environments.
Superior Edge Strength: The 1.2mm radius significantly increases the tool's resistance to chipping under heavy loads. Combined with the -GR (Roughing) chipbreaker, it excels in removing hard exterior skins of raw forgings and handling deep, aggressive cuts.
Technical Specifications:
| Brand | Korloy (100% Genuine) |
| ISO Code | SNMG150612-GR |
| Corner Radius | 1.2 mm (High Feed Efficiency) |
| Insert Thickness | 6.35 mm (Heavy Duty) |
| Grade | NC3030 (Ultra-Tough CVD Coating) |
Core Performance Benefits:
- Maximum Toughness: Specialized NC3030 substrate prevents crack propagation during heavy interrupted machining.
- Enhanced Surface Finish: The 1.2mm radius allows for higher feed rates while maintaining a stable surface roughness.
- Aggressive Metal Removal: Reinforced -GR chipbreaker pocket ensures smooth chip flow even at deep cuts (up to 8mm).
- Long Tool Life: Advanced CVD coating technology provides superior heat and wear resistance in continuous heavy roughing.
Recommended Cutting Parameters (Heavy Roughing):
| Material Group | Cutting Speed (Vc) | Feed Rate (fn) | Depth of Cut (ap) |
|---|---|---|---|
| Carbon Steel (Roughing) | 130 - 250 m/min | 0.35 - 0.75 mm/rev | 2.5 - 8.0 mm |
| Alloy Steel (Forged) | 100 - 200 m/min | 0.30 - 0.65 mm/rev | 2.0 - 7.0 mm |
| Severe Interruption | 70 - 140 m/min | 0.25 - 0.50 mm/rev | 1.5 - 5.0 mm |
Compatible Tool Holders:
Requires 15.875mm (5/8") IC negative tool holders:
- External Heavy Turning: MSSNR 2525M15 / 3232P15
Machinist Tip: When to choose SNMG150612-GR?
Optimizing your performance in heavy steel turning:
Unstable Conditions. If your machine is older, the workpiece is massive, or you are cutting through pre-machined holes or slots, NC3030 is the safest choice to avoid edge fracture.
General Turning. For clean, continuous cuts in medium-hard steel, NC3120 offers higher cutting speeds ($V_c$) and better wear resistance than NC3030.
Pro Advice: With a 1.2mm radius, you can push the feed rate ($f_n$) higher than with a 0.8mm radius. This helps in thinning the chip and moving heat into the chip instead of the insert, extending tool life significantly.
Packaging: 10 pieces per box.
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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.