Korloy DNMG150404-HS PC9030 Stainless Steel Super-Finishing Insert (10pcs)
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The Original Korloy DNMG150404-HS PC9030 (ANSI Standard: DNMG 431) is the premier choice for super-precision finishing of Stainless Steel (M) and Aerospace Alloys (S). Designed for the final pass, the HS (High-Sharpness) chipbreaker features a unique geometry that forces chip breaking at extremely light depths and low feed rates, where traditional "universal" inserts often fail and cause "bird-nesting." Coupled with the high-performance PC9030 PVD Nanostructured coating, this insert delivers a mirror-like finish and incredible dimensional consistency.
The Finishing Specialist: If your CNC machine is stopping due to tangled chips during finishing passes on 304 or 316 stainless, the HS geometry is the solution. It is engineered to maintain a sharp, cool cutting edge that prevents surface tearing and work-hardening.
Technical Specifications:
| Brand | Korloy (100% Genuine) |
| ISO Code | DNMG150404-HS |
| ANSI Code | DNMG 431 |
| Grade | PC9030 (Premium PVD for Stainless) |
| Nose Radius | 0.4 mm (Ultra-Precision) |
Core Performance Benefits:
- Exclusive HS Geometry: Optimized rake angles for minimal cutting resistance and maximum chip control at $ap < 1.0mm$.
- PVD Nano-Coating: PC9030 grade offers superior chemical stability, preventing the "sticking" effect of gummy stainless materials.
- Heat Dissipation: Designed to run cooler, protecting the precision R0.4 tip from thermal deformation during long finishing cycles.
- Enhanced Surface Quality: Eliminates vibration and surface smearing, ensuring parts meet the strictest tolerance requirements.
Recommended Cutting Parameters:
| Material Group | Cutting Speed (Vc) | Feed Rate (f) | Depth of Cut (ap) |
|---|---|---|---|
| Austenitic (304 / 316) | 120 - 210 m/min | 0.05 - 0.15 mm/rev | 0.1 - 1.2 mm |
| Titanium / Inconel | 40 - 80 m/min | 0.04 - 0.12 mm/rev | 0.1 - 0.8 mm |
| Martensitic (400 Series) | 130 - 230 m/min | 0.06 - 0.18 mm/rev | 0.2 - 1.5 mm |
Compatible Tool Holders:
Fits all standard 55-degree negative holders (15-size pocket):
- External Turning: DDJNR/L 2020K15 / 2525M15
- Boring Bars: S25S-DDUNR15 / S32T-DDUNR15 / S40U-DDUNR15
The Precision Tip: HS vs. HM Chipbreaker
Both use PC9030, but the geometry changes your results:
Best for Surface Finish. Choose this for your final pass when the part is nearly at size. It prevents the workpiece from becoming too hot and keeps chips small and manageable.
Best for General Use. HM is more robust for removing material. If you try to use HM for ultra-fine skin cuts, the chips might not break and could scratch your part.
Machinist's Insight: In stainless steel turning, "long chips are dangerous chips." The HS geometry is an insurance policy for your finished surface quality.
Packaging: 10 pieces per box.