Korloy SNMG120404-GS PC9030 Stainless Steel Turning Insert (10pcs)
Price shown is a starting point. Contact us for a precise quote based on your requirements.
The Original Korloy SNMG120404-GS PC9030 is a highly economical and precise Double-Sided Square Turning Insert, specifically optimized for Stainless Steel (M-Group) and Heat-Resistant Alloys. With a total of 8 cutting edges, this insert offers incredible value for high-volume production. The PC9030 PVD Coating is engineered to resist adhesive wear and thermal cracking, while the -GS (High-Precision Finishing) chipbreaker features a sharp rake angle to slice through "gummy" materials like 304 and 316 stainless steel with ease.
8-Edge Efficiency: Why pay more for fewer edges? The SNMG1204 series provides double the life compared to single-sided positive inserts (like SCMT). When paired with the GS chipbreaker, it becomes the go-to solution for achieving mirror-like finishes on stainless shafts and precision components.
Technical Specifications:
| Brand | Korloy (100% Genuine) |
| ISO Code | SNMG120404-GS |
| Corner Radius | 0.4 mm (Fine Finishing) |
| Inscribed Circle (IC) | 12.7 mm |
| Grade | PC9030 (Specialized PVD for Stainless) |
Core Performance Benefits:
- Exceptional Surface Quality: The GS chipbreaker is designed to produce short, manageable chips even at small depths of cut, preventing scratches on the workpiece.
- Advanced PVD Shield: PC9030's TiAlN layer prevents the chemical reaction between the tool and stainless steel that causes "built-up edge."
- High Economy: 8 usable corners per insert drastically reduce the cost-per-part in manufacturing.
- Extreme Toughness: The specialized substrate handles light interrupted cuts without edge failure.
Recommended Cutting Parameters (Stainless Steel):
| Material | Cutting Speed (Vc) | Feed Rate (fn) | Depth of Cut (ap) |
|---|---|---|---|
| 304 / 316 Stainless | 110 - 200 m/min | 0.05 - 0.20 mm/rev | 0.2 - 2.5 mm |
| 400 Series Stainless | 130 - 230 m/min | 0.08 - 0.25 mm/rev | 0.3 - 3.0 mm |
| Inconel / Super Alloys | 30 - 60 m/min | 0.05 - 0.15 mm/rev | 0.2 - 1.5 mm |
Compatible Tool Holders:
Fits all standard ISO holders for 12.7mm square negative inserts:
- External Turning: MSSNR 2020 / 2525 / 3232 Series
- Internal Boring Bars: S32T-MSSNR12 / S40U-MSSNR12
Machinist Tip: Why GS Chipbreaker for Stainless?
Optimizing your SNMG120404 results:
Precision & Control. The GS geometry is very sharp. It is designed to cut thin layers of material without rubbing. Use this when you need a tight tolerance and high surface finish on 300-series stainless.
Bulk Removal. If you need to take deep cuts or remove large amounts of material, the HM chipbreaker is stronger. However, it won't provide the same precision finishing as the GS.
Pro Advice: For SNMG120404-GS PC9030, if you encounter vibration, check your tool overhang. Negative inserts like SNMG generate higher radial forces than positive ones; ensure your setup is rigid to get the best out of the sharp GS edge.
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.