Korloy DNMG150408-HS PC9030 Stainless Steel Fine Turning Insert, R0.8 (10pcs)
Price shown is a starting point. Contact us for a precise quote based on your requirements.
The Original Korloy DNMG150408-HS PC9030 (ANSI Standard: DNMG 432) is a high-precision 55° diamond insert engineered for superior chip control during stainless steel finishing. When machining tough, stringy materials like 304 or 316 stainless, standard inserts often produce continuous chips that ruin surface finishes and cause machine downtime. The HS (High-Sharpness) chipbreaker is specifically designed to force chip curl and breakage even at shallow depths of cut, ensuring a clean and safe machining process.
Robust Precision: The R0.8 nose radius offers enhanced edge strength over the R0.4 version, making it suitable for finishing passes that encounter slightly uneven surfaces or for achieving faster cycle times while maintaining a high-quality finish.
Technical Specifications:
| Brand | Korloy (100% Genuine) |
| ISO Code | DNMG150408-HS |
| ANSI Code | DNMG 432 |
| Grade | PC9030 (Premium PVD for Stainless) |
| Nose Radius | 0.8 mm (Balanced Edge Strength) |
Core Performance Benefits:
- HS Fine-Finishing Geometry: Sharp cutting edge and optimized rake angle specifically designed to break chips in the 0.08 - 0.25mm feed range.
- Advanced PVD Coating: PC9030 provides excellent chemical stability and heat resistance, preventing the "sticking" common in austenitic stainless steels.
- Superior Surface Finish: Eliminates surface smearing and prevents "bird-nesting" chips from scratching the finished workpiece.
- Reduced Tool Pressure: Minimizes work-hardening and vibration, making it ideal for precision lathe work.
Recommended Cutting Parameters:
| Material Group | Cutting Speed (Vc) | Feed Rate (f) | Depth of Cut (ap) |
|---|---|---|---|
| Austenitic (304 / 316L) | 110 - 180 m/min | 0.10 - 0.25 mm/rev | 0.2 - 1.5 mm |
| Duplex Stainless Steel | 60 - 110 m/min | 0.08 - 0.20 mm/rev | 0.2 - 1.2 mm |
| Precipitation Hardening | 50 - 120 m/min | 0.10 - 0.22 mm/rev | 0.3 - 1.8 mm |
Compatible Tool Holders:
Standard fit for all 55-degree negative 15-size holders:
- External Turning: DDJNR/L 2020K15 / 2525M15 / 3232P15
- Boring Bars: S25S-DDUNR15 / S32T-DDUNR15 / S40U-DDUNR15
Machinist's Tip: HS vs. HM in Stainless Steel
When to switch from universal HM to precision HS:
Choose HS when your primary goal is Chip Control on finishing passes. It is sharper and creates more chip back-pressure to ensure the chip snaps, preventing surface damage.
Choose HM for General Reliability. It is more robust for removing material. If your chips are already breaking well with HM, stay with it for slightly better tool life in rougher conditions.
Pro Secret: For the best results with the HS chipbreaker, ensure your coolant is pointed directly at the tool tip to help flush away those small, broken chips.
Packaging: 10 pieces per box.
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.