Korloy VCMT160404-HMP PC9030 (ANSI VCMT 331-HMP) PVD Carbide Insert for Stainless Steel (10pcs)
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The Original Korloy VCMT160404-HMP PC9030 (ANSI Cross Reference: VCMT 331-HMP) is a premium 35° Rhombic Positive Insert engineered for High-Precision Stainless Steel Machining. Featuring the specialized PC9030 PVD Grade, this insert is designed to combat the unique challenges of stainless steel, such as work-hardening and built-up edge (BUE). The 1604 substrate (4.76mm thickness) provides the necessary rigidity for stable profiling, even in demanding internal boring applications.
The Anti-Adhesion Expert: Stainless steel tends to "weld" to the tool tip. The ultra-smooth PVD TiAlN coating of the PC9030 grade minimizes friction, ensuring the cutting edge stays sharp and the surface finish remains pristine over long production runs.
Technical Specifications (Metric & ANSI):
| ISO Designation | VCMT 160404-HMP |
| ANSI Designation | VCMT 331-HMP |
| Inscribed Circle (IC) | 9.525 mm / (3/8") |
| Thickness (S) | 4.76 mm / (3/16") |
| Corner Radius (r) | 0.4 mm / (1/64") |
| Grade | PC9030 (Premium PVD Coated) |
| Primary Material | Stainless Steel (M), HRSA (S) |
Core Performance Benefits:
- Advanced PVD TiAlN Coating: Offers exceptional oxidation resistance and hardness at high temperatures, perfect for the heat-concentrated cuts typical of 304 and 316 stainless.
- Precise 0.4mm Radius: Generates lower radial cutting forces than larger radii, making it ideal for vibration-prone setups or fine finishing of intricate contours.
- HMP "Harmony" Chipbreaker: Specifically tuned for medium-duty cutting, providing consistent chip evacuation even in "gummy" materials.
- Tough Substrate: The fine-grain carbide matrix absorbs the shocks of light interruptions, ensuring the edge doesn't chip prematurely.
Recommended Cutting Parameters:
| Workpiece Material | Cutting Speed (Vc) | Feed Rate (fn) | Depth of Cut (ap) |
|---|---|---|---|
| Austenitic (304/316) | 90 - 170 m/min | 0.08 - 0.18 mm/rev | 0.3 - 2.0 mm |
| Duplex Stainless | 50 - 100 m/min | 0.07 - 0.15 mm/rev | 0.3 - 1.5 mm |
Compatible Tooling:
- Internal Boring Bars: S32T-SVUCR16 / S40U-SVQCR16 (Right-hand)
- External Profiling: SVJCR 2020K16 / SVJCR 2525M16
Pro Tip: Precision Stainless Profiling
Optimizing the VCMT 160404 for exotic alloys:
Because of the 0.4mm radius, this insert is excellent for thin-walled stainless tubes. It cuts with less pressure than an R0.8, preventing the part from deforming or chattering.
When machining stainless with PVD grades, use high-concentration emulsion or oil. This lubricates the HMP chipbreaker, allowing chips to slide off smoothly without marring the finish.
Packaging: 10 pieces per box.
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