Korloy SNMG120408-HM NC3120 Universal Steel Turning Insert 0.8mm (10pcs)
Price shown is a starting point. Contact us for a precise quote based on your requirements.
The Original Korloy SNMG120408-HM NC3120 is the premier "Universal Choice" for high-efficiency Steel (P-Group) turning. Featuring a robust 0.8mm Corner Radius and the legendary NC3120 CVD Grade, this insert provides the perfect equilibrium between heat resistance and impact toughness. Designed as a "One-Grade-Fits-All" solution for steel, the -HM (Highly Medium) chipbreaker excels in managing heavy chip loads, making it ideal for both roughing and semi-finishing in job shop environments.
Maximum Versatility: NC3120 is engineered to handle the widest variety of steel materials. If you process everything from A36 mild steel to 4140 alloy steel on the same machine, this insert eliminates the need for constant grade changes, maximizing your spindle uptime.
Technical Specifications:
| Brand | Korloy (100% Genuine) |
| ISO Code | SNMG120408-HM |
| Corner Radius | 0.8 mm (Enhanced Durability) |
| Substrate | NC3120 (Universal CVD Multi-Layer) |
| Cutting Edges | 8 Usable Corners |
Core Performance Benefits:
- Broad Operating Window: Performs reliably across a vast range of speeds and feeds, reducing tool failures in fluctuating conditions.
- Impact Resistance: The 0.8mm radius provides the structural strength to handle light to medium interrupted cuts without chipping.
- Superior Coating Adhesion: Advanced CVD technology ensures the coating stays on the tool longer, even during high-heat dry cutting.
- Double-Sided Economy: 8 cutting edges provide a significantly lower cost-per-part than single-sided positive inserts.
Recommended Cutting Parameters (Universal Steel):
| Material Group | Cutting Speed (Vc) | Feed Rate (fn) | Depth of Cut (ap) |
|---|---|---|---|
| Carbon Steel (1045 / S45C) | 150 - 300 m/min | 0.20 - 0.50 mm/rev | 1.5 - 5.0 mm |
| Alloy Steel (4140 / 42CrMo) | 120 - 240 m/min | 0.15 - 0.40 mm/rev | 1.2 - 4.5 mm |
| Tool Steel / Pre-hardened | 80 - 180 m/min | 0.12 - 0.35 mm/rev | 1.0 - 4.0 mm |
Compatible Tool Holders:
Precision designed for all standard 12.7mm (1/2") IC negative holders:
- External Turning (Best Seller): MSSNR 2525M12 / 3232P12
- Boring Bars: S32T-MSSNR12 / S40U-MSSNR12
Machinist Tip: Why NC3120 is the "Safe" Bet
Making the right choice for your steel turning production:
The Shop Favorite. Use this when you have a mix of different steels and varying machine stabilities. It offers the most predictable tool life across the widest range of applications.
Performance Extremes. Only switch to NC3020 if you are doing long-run continuous cutting at max RPM. Only switch to NC3030 if your part is severely interrupted or hexagonal.
Pro Advice: For SNMG120408-HM, ensure your feed rate ($fn$) is at least 0.20mm/rev. Steel is a material that requires force to break the chip; if you feed too lightly, the chip will rub and cause premature wear instead of breaking.
Packaging: 10 pieces per box.
Korloy SNMG120408-HM price, versatile turning inserts for alloy steel, NC3120 grade cutting speed, SNMG 120408-HM cutting parameters, 8-edged turning inserts for CNC lathe
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.