Korloy DNMG150408-HS PC9030 Stainless Steel Fine Turning Insert, R0.8 (10pcs)
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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.