Korloy DNMG110404-HM PC9030 Stainless Steel Turning Insert, R0.4 (10pcs)
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The Original Korloy DNMG110404-HM PC9030 (ANSI Standard: DNMG 331) is a world-class solution for machining Stainless Steel (M) and Heat-Resistant Alloys (S). Unlike standard steel inserts, the PC9030 grade utilizes a specialized PVD Nanostructured coating that offers exceptional heat resistance and surface smoothness. This drastically reduces the chemical reaction between the insert and the workpiece, preventing the "built-up edge" (BUE) that commonly leads to poor surface finishes and sudden insert failure in stainless steel applications.
Precision for Stainless Steel: The R0.4 nose radius combined with the sharp HM chipbreaker geometry allows for incredibly clean cuts at light depths, making it perfect for the final finishing stages of high-precision stainless steel components.
Technical Specifications:
| Brand | Korloy (100% Genuine) |
| ISO Code | DNMG110404-HM |
| ANSI Code | DNMG 331 |
| Grade | PC9030 (Premium PVD for Stainless) |
| Target Material | Stainless Steel (M), HRSA (S) |
Core Performance Benefits:
- PVD Nano-Coating: Provides a sharp, stable cutting edge that resists the "gummy" nature of 304 and 316 stainless steel.
- Anti-Adhesion: Smooth coating surface prevents chips from welding to the insert, ensuring consistent surface finish.
- Tough Substrate: Specifically balanced to handle the work-hardening challenges of stainless materials and light interrupted cuts.
- HM Chipbreaker: Optimized for low-to-medium feed rates, delivering excellent chip breaking and reducing tool pressure.
Recommended Cutting Parameters:
| Material Group | Cutting Speed (Vc) | Feed Rate (f) | Depth of Cut (ap) |
|---|---|---|---|
| Stainless Steel (304 / 316) | 100 - 180 m/min | 0.08 - 0.20 mm/rev | 0.3 - 2.0 mm |
| Duplex Stainless Steel | 60 - 120 m/min | 0.07 - 0.18 mm/rev | 0.3 - 1.5 mm |
| Inconel / Heat-Resistant Alloys | 30 - 60 m/min | 0.05 - 0.15 mm/rev | 0.2 - 1.0 mm |
Compatible Tool Holders:
Standard fit for all 55-degree negative holders (11-size pocket):
- External Precision Holders: DDJNR/L 1616H11 / 2020K11 / 2525M11
- Internal Boring Bars: S20R-DDUNR11 / S25S-DDUNR11 / S32T-DDUNR11
Stainless Steel Pro Tip: PC9030 vs. NC Series
Why you shouldn't use your steel inserts (NC3020/NC3120) on stainless steel:
Uses PVD Coating. PVD coatings are thinner and sharper than CVD, which is essential for "slicing" through stainless steel without causing work-hardening. PC9030 is the industry standard for 300-series stainless.
Uses CVD Coating. While great for heat resistance in carbon steel, CVD coatings are often too thick/blunt for stainless, leading to instant built-up edge and surface tearing.
Machinist's Secret: Always use plenty of high-quality coolant when using PC9030 on stainless steel to flush away the gummy chips and maintain the integrity of the PVD coating.
Packaging: 10 pieces per box.