Korloy VBMT160404-HMP PC9030 (ANSI VBMT 331-HMP) PVD Carbide Insert for Stainless Steel (10pcs)
Price shown is a starting point. Contact us for a precise quote based on your requirements.
The Original Korloy VBMT160404-HMP PC9030 (ANSI Cross Reference: VBMT 331-HMP) is a premium 35° Rhombic Positive Insert designed specifically for the challenges of Stainless Steel Machining. Utilizing a reinforced 1604 substrate and the advanced PC9030 PVD Grade, this insert excels in preventing work-hardening and built-up edge (BUE). It is the ideal choice for semi-finishing and medium cutting on large stainless components where thermal stability and edge toughness are paramount.
Heavy-Duty Stainless Specialist: The 1604 size (4.76mm thickness) provides the necessary rigidity to handle the high cutting pressures of stainless steel. Combined with PC9030’s anti-adhesion properties, it ensures high-precision turning even in gummy materials like 304 and 316.
Technical Specifications (Metric & ANSI):
| ISO Designation | VBMT 160404-HMP |
| ANSI Designation | VBMT 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 (TiAlN PVD Coated) |
| Primary Material | Stainless Steel (M), Exotic Alloys (S) |
Core Performance Benefits:
- Superior Wear Resistance: The high-aluminum TiAlN PVD coating provides a hard, heat-resistant barrier that protects the substrate during long cuts.
- Reduced Tool Pressure: The HMP chipbreaker is designed to minimize radial forces, which is critical for preventing vibration on slender stainless shafts.
- Excellent Edge Sharpness: Unlike CVD grades, the PVD PC9030 maintains a sharper edge, essential for slicing through stainless steel rather than "pushing" it.
- Versatile 35° Geometry: Perfect for profiling, undercutting, and complex contours on stainless housings and valves.
Recommended Cutting Parameters:
| Workpiece Material | Cutting Speed (Vc) | Feed Rate (fn) | Depth of Cut (ap) |
|---|---|---|---|
| 300 Series Stainless (304/316) | 90 - 160 m/min | 0.08 - 0.20 mm/rev | 0.3 - 2.5 mm |
| 400 Series Stainless (420/440) | 110 - 190 m/min | 0.10 - 0.22 mm/rev | 0.5 - 3.0 mm |
Precision Tooling Compatibility:
- External Profile Tool Holders: SVJBR 2020K16 / SVJBR 2525M16
- Internal Boring Bars: S32T-SVUBC16 / S40U-SVQBC16
Machinist Tip: Mastering 316 Stainless
How to optimize the VBMT 160404 for exotic metals:
Stainless steel has poor thermal conductivity. The heat stays at the tool tip. Always use plenty of high-pressure coolant to flush chips and keep the PC9030 coating within its ideal temperature range.
Stainless steel work-hardens instantly. Ensure your Depth of Cut (ap) is greater than the corner radius (0.4mm) whenever possible to get the tool tip beneath the work-hardened layer from the previous pass.
Packaging: 10 pieces per box.
VBMT 331-HMP Korloy PC9030, VBMT160404 for stainless steel, PC9030 PVD coating benefits, best insert for 316 stainless turning, Korloy HMP chipbreaker stainless, SVJBR 2525M16 stainless steel inserts
Technical FAQ & Buying Guide
Absolutely. Our CNC carbide inserts (including CNMG, WNMG, DNMG, and APMT series) are manufactured strictly adhering to international ISO/ANSI specifications. A CNMG 120408 from OYYU BEYOND will flawlessly fit any standard turning tool holder or indexable tool from major global brands like Sandvik Coromant, Kennametal, Iscar, Walter, or SECO, providing a highly cost-effective premium alternative without sacrificing tolerance or tool life.
We offer optimized CVD and PVD multi-layer coatings for different ISO material groups:
- For Carbon/Alloy Steel (ISO P): Choose our thick multi-layer CVD coated grades (e.g., Al2O3 + TiN). They provide exceptional crater wear resistance and thermal barriers during high-speed dry or wet roughing.
- For Stainless Steel (ISO M): Choose our nano-structured PVD coated grades with sharp, positive chipbreakers (like -TM or -MA). This combination prevents work hardening and effectively controls sticky chips.
The optimal cutting parameters vary depending on the workpiece hardness and operation type:
- For General Steel Turnings: Recommended cutting speed ($V_c$) ranges from 150 to 280 m/min, with a feed rate ($f$) of 0.15 to 0.45 mm/rev.
- For Stainless Steel Finishing: Recommended cutting speed ($V_c$) is 120 to 200 m/min, with a feed rate ($f$) of 0.10 to 0.25 mm/rev.Always adjust parameters based on early wear patterns: increase $V_c$ if built-up edge occurs, or reduce $V_c$ if severe flank wear is observed.
Yes, we support machine shops, distributors, and global buyers with tiered wholesale pricing and competitive volume discounts. We also provide OEM custom manufacturing solutions for tool holders and carbide inserts based on your technical drawings. Contact our team to request a quick B2B quotation.
We provide secure worldwide express shipping (via DHL, FedEx, and UPS) with specialized, vibration-proof industrial packaging to ensure tools arrive in perfect condition. In-stock items are dispatched within 24-48 hours, while custom or bulk orders typically have a stable lead time of 15-25 days.
All our cutting tools and tool holders are manufactured strictly in accordance with ISO 9001 and international industrial standards. Every batch undergoes 100% rigorous quality control testing using high-precision optical measuring equipment to ensure reliable tool life and stable performance in continuous mass production.