Korloy VBMT160408-HMP PC9030 (ANSI VBMT 332-HMP) PVD Carbide Insert for Stainless Steel (10pcs)
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The Original Korloy VBMT160408-HMP PC9030 (ANSI Cross Reference: VBMT 332-HMP) is a high-performance 35° Rhombic Positive Insert optimized for High-Efficiency Stainless Steel Machining. 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 high-temperature alloys.
Maximum Productivity: 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.
Technical Specifications (Metric & ANSI):
| ISO Designation | VBMT 160408-HMP |
| ANSI Designation | VBMT 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 (TiAlN PVD Coated) |
| Application | Stainless Steel (M), Exotic Alloys (S) |
Core Performance Benefits:
- Premium PC9030 PVD Grade: A specialized TiAlN coating layer prevents built-up edge (BUE) and offers superior resistance to oxidation at high temperatures.
- Enhanced Edge Security: The R0.8 radius provides a larger contact area to dissipate heat and support higher chip loads, reducing the risk of sudden insert breakage.
- Efficient HMP Chipbreaker: Effectively manages the long, stringy chips common in austenitic stainless steels (304/316), preventing "bird-nesting" on the workpiece.
- Excellent Surface Quality: Achieves high Ra values even at increased feed rates due to the stable 1604 substrate.
Recommended Cutting Parameters:
| Workpiece Material | Cutting Speed (Vc) | Feed Rate (fn) | Depth of Cut (ap) |
|---|---|---|---|
| Austenitic (304/316) | 80 - 150 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 |
Universal Holder Compatibility:
- External Profile Tooling: SVJBR 2525M16 / SVVBN 2020K16
- Precision Boring Bars: S32T-SVUBC16 / S40U-SVQBC16
Machinist Tip: Increasing Stainless Tool Life
How to get the most out of your VBMT 332-HMP:
Because the VBMT has a 35° clearance, radial forces can be high. With the R0.8 tip, maintain a feed of at least 0.15mm/rev to ensure the HMP chipbreaker engages correctly and curls the chips away from the finish surface.
Stainless steel retains heat in the cut. The PC9030 PVD coating is tough, but it performs best with consistent coolant flow. Avoid intermittent cooling, as this can lead to thermal micro-cracking of the insert edge.
Packaging: 10 pieces per box.
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