Korloy CNMG120408-HS PC9030 Stainless Steel Semi-Finishing Insert (10pcs)
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The Original Korloy CNMG120408-HS PC9030 (ANSI Standard: CNMG 432) is a high-performance PVD-coated carbide insert specifically designed for the precision semi-finishing of Stainless Steel. While most roughing inserts struggle with "bird-nesting" chips in gummy materials like 304 and 316, the HS chipbreaker provides a sharp rake angle that forces chips to break even at lighter depths of cut. The 0.8mm (1/32") nose radius offers enhanced edge strength, making it ideal for maintaining tight tolerances over long production runs.
The Finishing Professional: PC9030 grade combined with HS geometry minimizes cutting force and prevents work hardening, ensuring your workpiece stays within spec and maintains a bright finish.
Technical Specifications:
| Brand | Korloy (100% Genuine) |
| ISO Code | CNMG120408-HS |
| ANSI Code | CNMG 432 |
| Grade | PC9030 (PVD Specialist for Stainless & HRSA) |
| Nose Radius | 0.8 mm (1/32") - Balanced Strength |
Core Performance Benefits:
- Excellent Anti-Adhesion: The ultra-smooth PVD coating prevents "built-up edge" (BUE), a common failure mode in stainless steel turning.
- Precise Chip Management: HS geometry is optimized for shallow to medium depths of cut, ensuring clean chip evacuation without scratching the workpiece.
- Sharp Shearing Action: Minimizes the radial pressure on the workpiece, significantly reducing vibration and heat buildup.
- Multi-Purpose Durability: While optimized for stainless, it is also highly effective in Super Alloys (Inconel, Titanium) and high-temp materials.
Recommended Cutting Parameters:
| Workpiece Material | Cutting Speed (Vc) | Feed Rate (f) | Depth of Cut (ap) |
|---|---|---|---|
| Austenitic (304 / 316) | 110 - 220 m/min | 0.10 - 0.25 mm/rev | 0.5 - 2.5 mm |
| Duplex Stainless (2205) | 70 - 140 m/min | 0.08 - 0.20 mm/rev | 0.5 - 2.0 mm |
Compatible Tool Holders:
To achieve the best surface finish, use a high-rigidity D-Type or M-Type clamping system:
- External Turning: PCLNR/L 2020K12 / PCLNR/L 2525M12 / DCLNR/L 2525M12
- Boring Bars (Internal): S25S-PCLNR12 / S32T-PCLNR12
Stainless Shop Guide: PC9030 vs. PC5300
Which Korloy PVD grade should you choose?
Best for preventing built-up edge on Austenitic and Duplex stainless steel. High chemical stability for cleaner finishes.
Optimized for toughness across multiple materials (Steel, Stainless, Cast Iron). Best for interrupted cuts and unstable setups.
Machinist's Tip: For stainless finishing, if the chip color is dark blue/purple, increase your coolant flow or decrease Vc to avoid premature thermal wear on the PC9030 coating.
Packaging: 10 pieces per box.