Mitsubishi CPMH080204-MV US7020 Stainless Steel Turning Insert (10pcs)
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CPMH080204-MV US7020
Stainless Steel Specialist | US7020 Anti-Galling Grade | MV Edge Precision
Mastering Gummy & Tough Materials
US7020 Grade (Stainless Steel Expert): The US7020 is a premium CVD-coated grade designed specifically for M-Class (Stainless Steel). Stainless steel turning often results in "Built-up Edge" (BUE) where the material welds to the tool. US7020 utilizes a smooth, heat-resistant coating that prevents adhesion and resists crater wear, ensuring a stable edge even during long cutting cycles in 304, 316, or Duplex stainless.
MV Chipbreaker (Versatile Medium Control): The MV geometry is a positive-rake design optimized for chip control in soft, ductile materials. It features a sharp cutting edge that reduces cutting force, which is critical for preventing work-hardening of the stainless surface and reducing vibration in thin-walled parts.
0.4mm (1/64") Precision Radius: The 04 radius is the global standard for detail. It provides excellent surface finish quality and the lowest possible radial pressure, making it the perfect choice for small-diameter turning and internal boring.
Metric vs. Imperial Comparison
| System | Model Designation | I.C. (Inscribed Circle) | Thickness | Radius (RE) |
|---|---|---|---|---|
| Metric | CPMH080204-MV | 7.94 mm | 2.38 mm | 0.40 mm |
| Imperial | CPMH2.521-MV | 5/16" | 3/32" | 0.0157" (1/64") |
Recommended Cutting Parameters
*Stainless steel requires constant chip load. Avoid dwelling or too low a feed to prevent surface hardening.
| Workpiece Material | Speed (Vc) | Feed (fn) | Depth (Ap) |
|---|---|---|---|
| Austenitic (304/316) | 120 - 200 m/min | 0.05 - 0.20 mm/r | 0.20 - 1.50 mm |
| Martensitic/Ferritic | 140 - 230 m/min | 0.06 - 0.22 mm/r | 0.25 - 1.80 mm |
Compatible Tool Holders
Maximum performance is achieved with SCLC or SCPC series precision holders:
Shop SCLC HoldersPro-Tip: US7020 vs. US735
US7020 (The Stable Choice): Ideal for continuous turning and medium speeds. It offers higher wear resistance on the flank.
US735 (The Tough Choice): Switch to US735 if you encounter heavy interrupted cuts or if your machine is prone to vibration, as it offers the highest shock resistance in stainless grades.
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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.