Korloy DNMG150404-HM PC9030 Stainless Steel Finishing Insert (10pcs)
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The Original Korloy DNMG150404-HM PC9030 (ANSI Standard: DNMG 431) is a specialized 55° diamond insert engineered for precision finishing of Stainless Steel (M) and Exotic Alloys (S). Utilizing Korloy's advanced PVD Nanostructured coating, the PC9030 grade effectively solves the most common issues in stainless turning: built-up edge (BUE) and work-hardening. The sharp 0.4mm nose radius minimizes cutting pressure, delivering an exceptional mirror-like finish even on gummy materials like 304 or 316L.
Superior Finish Quality: PC9030 features an ultra-smooth PVD layer that prevents micro-chipping and adhesion. It is the ideal choice for high-tolerance stainless components in the medical, aerospace, and food-processing industries.
Technical Specifications:
| Brand | Korloy (100% Genuine) |
| ISO Code | DNMG150404-HM |
| ANSI Code | DNMG 431 |
| Grade | PC9030 (Premium PVD for Stainless) |
| Nose Radius | 0.4 mm (High-Precision Finishing) |
Core Performance Benefits:
- Anti-Adhesion Coating: The smooth PVD surface ensures chips flow freely, preventing them from welding to the cutting edge.
- Sharp Edge Geometry: Reduced cutting forces prevent the vibration and chatter often associated with machining stainless steel.
- Chemical Stability: PC9030 resists oxidative wear at high temperatures, maintaining edge sharpness for longer finishing cycles.
- Versatile HM Chipbreaker: Designed for stable chip evacuation even at very small depths of cut (ap).
Recommended Cutting Parameters:
| Material Group | Cutting Speed (Vc) | Feed Rate (f) | Depth of Cut (ap) |
|---|---|---|---|
| Austenitic Stainless (304/316) | 110 - 200 m/min | 0.05 - 0.18 mm/rev | 0.2 - 1.5 mm |
| Martensitic Stainless (420/440) | 100 - 180 m/min | 0.08 - 0.20 mm/rev | 0.3 - 2.0 mm |
| Duplex Stainless Steel | 70 - 130 m/min | 0.05 - 0.15 mm/rev | 0.2 - 1.2 mm |
Compatible Tool Holders:
Fits all standard 55-degree negative 15-size holders:
- External Precision Holders: DDJNR/L 2020K15 / 2525M15
- Internal Boring Bars: S25S-DDUNR15 / S32T-DDUNR15 / S40U-DDUNR15
The Stainless Mastery: PC9030 vs. NC3120
Why choosing the correct coating matters for stainless steel:
Uses a thin, ultra-sharp PVD coating. Perfect for stainless steel because it cuts through the material cleanly, preventing work-hardening and built-up edge.
Uses a thicker CVD coating. While excellent for carbon steel, it's often too "blunt" for stainless, causing the material to smear and stick to the insert.
Machinist's Pro Tip: If your stainless steel chips look "burnt" or torn, switch to PC9030. Always ensure high-pressure coolant is directed at the cutting tip to maximize the life of the PVD layer.
Packaging: 10 pieces per box.