Korloy SNMG120404-HM NC3030 Tough Steel Turning Insert (10pcs)
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The Original Korloy SNMG120404-HM NC3030 is a heavy-duty Double-Sided Square Turning Insert engineered for Steel (P-Group) applications where toughness is the priority. Featuring the advanced NC3030 CVD Grade, this insert is specifically optimized for interrupted cuts, rough surfaces, and unstable machining conditions. The -HM (Highly Medium) chipbreaker provides a reinforced edge profile that effectively manages chips during medium-to-heavy removal passes, ensuring process security in carbon and alloy steels.
Superior Impact Resistance: If your job involves machining hexagonal bars, parts with keyways, or raw forged steel, the NC3030 grade is your best defense against edge chipping. Its enhanced substrate toughness absorbs the shock of repeated impacts better than any other standard CVD grade.
Technical Specifications:
| Brand | Korloy (100% Genuine) |
| ISO Code | SNMG120404-HM |
| Corner Radius | 0.4 mm (High Precision / Low Pressure) |
| Edges | 8 Edges (Double-Sided Design) |
| Grade | NC3030 (Ultra-Tough CVD for Steel) |
Core Performance Benefits:
- Shock-Absorbing Substrate: Specifically formulated to prevent edge fracture during the most demanding interrupted cuts.
- Advanced CVD Thermal Shield: Multi-layer coating prevents heat deformation and allows for consistent performance in dry or wet cutting.
- Reinforced HM Geometry: The land area on the cutting edge is widened to provide maximum support under high-pressure loads.
- Unbeatable Cost Efficiency: 8 usable edges per insert provide the lowest cost-per-cut for industrial steel fabrication.
Recommended Cutting Parameters (Heavy Duty Steel):
| Material | Cutting Speed (Vc) | Feed Rate (fn) | Depth of Cut (ap) |
|---|---|---|---|
| Carbon Steel (Rough Surface) | 120 - 250 m/min | 0.15 - 0.35 mm/rev | 1.0 - 4.5 mm |
| Alloy Steel (Interrupted) | 100 - 200 m/min | 0.12 - 0.30 mm/rev | 0.8 - 3.5 mm |
| Structural Steel (A36) | 140 - 280 m/min | 0.15 - 0.40 mm/rev | 1.0 - 5.0 mm |
Compatible Tool Holders:
Universal fit for standard negative 12.7mm (1/2") IC holders:
- External Turning: MSSNR 2525M12 / 3232P12
- Internal Boring Bars: S25S-MSSNR12 / S32T-MSSNR12
Machinist Tip: NC3030 vs. NC3020
When to switch to the tougher NC3030 grade:
Safety First. Best for interrupted cuts and unstable machine setups. It prioritizes toughness over speed to prevent catastrophic tool failure in difficult conditions.
Productivity First. Best for stable, continuous cutting at high speeds. It lasts longer in clean steel but might chip if it hits a hard spot or a keyway.
Pro Advice: When using SNMG120404-HM NC3030 for interrupted cuts, ensure you use a "Top Clamp" style tool holder (like PSSKNR). This provides the most rigid clamping force to prevent the insert from vibrating during impact.
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.