Korloy VCMT160408-HMP PC9030 (ANSI VCMT 332-HMP) PVD Carbide Insert for Stainless Steel (10pcs)
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The Original Korloy VCMT160408-HMP PC9030 (ANSI Cross Reference: VCMT 332-HMP) is a high-performance 35° Rhombic Positive Insert optimized for High-Efficiency Stainless Steel Profiling. Featuring a reinforced 0.8mm (1/32") Corner Radius and the legendary PC9030 PVD Grade, this insert provides the perfect balance of edge strength and heat resistance. It is engineered to excel in semi-finishing to medium cutting of 300/400 series stainless steels and heat-resistant alloys.
Maximum Edge Security: The 160408 configuration allows for significantly higher feed rates compared to the 04 radius version. Its robust edge design withstands the mechanical shock of interrupted cuts and the thermal stress typical of stainless steel production, especially in deep internal boring.
Technical Specifications (Metric & ANSI):
| ISO Designation | VCMT 160408-HMP |
| ANSI Designation | VCMT 332-HMP |
| Inscribed Circle (IC) | 9.525 mm / (3/8") |
| Thickness (S) | 4.76 mm / (3/16") |
| Corner Radius (r) | 0.8 mm / (1/32") |
| Grade | PC9030 (Premium PVD Coated) |
| Application | Stainless Steel (M), Exotic Alloys (S) |
Core Performance Benefits:
- High-Performance PC9030 PVD Grade: Features a dense TiAlN coating that prevents built-up edge (BUE) and offers superior resistance to heat-related wear.
- Reinforced R0.8 Edge: The 0.8mm radius provides a larger contact area to dissipate heat and support higher chip loads, making it much more durable than the R0.4 version.
- Efficient HMP Chipbreaker: Specially designed for "Harmony Medium-Positive" performance, ensuring smooth chip evacuation in gummy materials like 304 and 316.
- Rigid Indexing: The VCMT's V-bottom design ensures the insert remains perfectly seated in the holder, even during high-feed profiling.
Recommended Cutting Parameters:
| Workpiece Material | Cutting Speed (Vc) | Feed Rate (fn) | Depth of Cut (ap) |
|---|---|---|---|
| Austenitic (304/316) | 80 - 160 m/min | 0.12 - 0.28 mm/rev | 0.8 - 3.0 mm |
| Duplex Stainless Steel | 60 - 110 m/min | 0.10 - 0.22 mm/rev | 0.5 - 2.5 mm |
Compatible Tooling Systems:
- Internal Boring Bars: S32T-SVUCR16 / S40U-SVQCR16 (Right-hand)
- External Profiling Holders: SVJCR 2020K16 / SVJCR 2525M16
Machinist Tip: Scaling Up Productivity
Why choose the R0.8 (VCMT 332) for your stainless jobs:
Stainless steel work-hardens instantly. With the R0.8 edge, you can use a higher feed rate to stay under the work-hardened layer, increasing both tool life and surface integrity.
The R0.8 radius generates more radial force than the R0.4. When using the S32T-SVUCR16 boring bar, ensure the overhang is as short as possible to avoid chatter at high feed rates.
Packaging: 10 pieces per box.
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