Korloy VBMT110304-HMP PC9030 (ANSI VBMT 221-HMP) PVD Coated Insert for Stainless Steel (10pcs)
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The Original Korloy VBMT110304-HMP PC9030 (ANSI Cross Reference: VBMT 221-HMP) is the industry standard for Stainless Steel Machining. This 35° Rhombic Positive Insert is engineered with the PC9030 PVD Grade, which combines an ultra-fine substrate with a TiAlN coating to provide exceptional toughness and oxidation resistance. It is the go-to choice for semi-finishing 300 and 400 series stainless steels, as well as heat-resistant alloys.
Precision in Stainless: Stainless steel is notorious for work-hardening and "sticking" to the tool. The PC9030 grade features a smooth PVD surface that prevents Built-Up Edge (BUE) and chipping, ensuring a superior surface finish and consistent tool life.
Technical Specifications (Metric & ANSI):
| ISO Designation | VBMT 110304-HMP |
| ANSI Designation | VBMT 221-HMP |
| Inscribed Circle (IC) | 6.35 mm / (1/4") |
| Thickness (S) | 3.18 mm / (1/8") |
| Corner Radius (r) | 0.4 mm / (1/64") |
| Grade | PC9030 (Premium PVD Coated) |
| Target Materials | Stainless Steel (M), HRSA (S) |
Core Performance Benefits:
- Anti-Adhesion Coating: The TiAlN PVD film reduces friction, drastically lowering the chance of workpiece material welding to the cutting edge.
- Ultra-Fine Grain Substrate: Provides the high-level toughness required to handle the interrupted cuts and vibrations common in small boring operations.
- Balanced HMP Chipbreaker: Optimized for medium-finishing, providing a "harmony" between low cutting forces and reliable chip breaking in gummy materials.
- Thermal Stability: Excels in both wet and dry cutting, resisting thermal cracking during intermittent coolant application.
Recommended Cutting Parameters:
| Workpiece Material | Cutting Speed (Vc) | Feed Rate (fn) | Depth of Cut (ap) |
|---|---|---|---|
| Austenitic (304/316) | 80 - 180 m/min | 0.05 - 0.20 mm/rev | 0.2 - 2.0 mm |
| Martensitic (410/420) | 100 - 200 m/min | 0.05 - 0.22 mm/rev | 0.2 - 2.5 mm |
PC9030 vs. PC9035: Which to Choose?
Ideal for Stable to Light Interruption. Offers a perfect balance of wear resistance and toughness for 80% of stainless applications.
The choice for Heavy Interrupted Cutting or unstable setups. Maximizes toughness at the cost of some wear resistance.
Packaging: 10 pieces per box.
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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.