Mitsubishi WCMT040204 US735 Carbide Inserts for Stainless Steel Turning
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MITSUBISHI WCMT040204 US735
Advanced CVD Coated Grade | The Stainless Steel Specialist
Product Overview
The Mitsubishi WCMT040204 US735 is a high-performance, 80° trigon positive turning insert designed specifically for stainless steel machining. Engineered with a specialized CVD coating, the US735 grade offers superior resistance to thermal cracking and adhesive wear. Whether you are performing continuous cutting or interrupted turns, these inserts deliver stable tool life and an excellent surface finish on austenitic, ferritic, and martensitic stainless steels.
ISO Model Code Breakdown
80° Trigon Shape
7° Relief Angle
Medium Tolerance
Hole/Chipbreaker
IC Size (6.35mm)
Thickness (2.38mm)
Radius (0.4mm)
Metric vs. Imperial Comparison
| Specifications | Metric (ISO) | Imperial (ANSI) |
|---|---|---|
| Model Reference | WCMT 040204 | WCMT 2(1.5)1 |
| Inscribed Circle (IC) | 6.35 mm | 0.250 inch |
| Corner Radius | 0.4 mm | 0.016 inch |
Recommended Cutting Parameters
Optimized for medium-duty turning in stainless steel:
- Cutting Speed (Vc): 90 - 160 m/min (295 - 525 SFM)
- Feed Rate (f): 0.08 - 0.20 mm/rev (0.003 - 0.008 ipr)
- Depth of Cut (ap): 0.5 - 2.0 mm
*For hardened alloys, reduce Vc by 20% to maximize tool life.
Grade: US735 CVD Nano-Coating
The US735 carbide grade is Mitsubishi's premier solution for difficult-to-cut materials. By utilizing a thick CVD (Chemical Vapor Deposition) coating, these inserts provide an excellent barrier against high cutting temperatures, preventing the edge deformation common in CNC turning centers.
Chipbreaker Performance
The WCMT geometry combined with the 0.4mm radius ensures smooth chip evacuation. It is specifically designed to handle the gummy nature of stainless steel, preventing long "stringy" chips that can scratch your workpiece or damage the tool holder.
Compatible with Professional Holders:
Shop SWLCR / SWGCR Tool HoldersGlobal Verified Reviews
⭐⭐⭐⭐⭐ "Great for 316L" - Robert T., United Kingdom
"The tool life is exceptional. We used these for a large run of 316L stainless connectors and the US735 grade outperformed everything else."
⭐⭐⭐⭐⭐ "Consistent Quality" - Hans B., Germany
"Original Mitsubishi product. Dimensions are perfect, and the chips break nicely even at lower feeds."
⭐⭐⭐⭐ "Very Stable" - Giovanni L., Italy
"Stable performance on my CNC lathe. Good surface finish."
⭐⭐⭐⭐⭐ "Fast Shipping" - Hiro M., Japan
"Authentic inserts. US735 is very tough for interrupted cuts."
⭐⭐⭐⭐⭐ "Highly Recommend" - Liam J., Australia
"The best value for money for stainless steel turning. Very reliable."
Frequently Asked Questions
Q1: Can I use WCMT040204 for roughing?
A: While US735 is a tough grade, the 040204 size is best suited for finishing to medium-duty turning. For heavy roughing, we recommend an insert with a larger corner radius and thicker cross-section.
Q2: What is the benefit of the CVD coating?
A: CVD (Chemical Vapor Deposition) coatings are thicker and more heat-resistant than PVD, making US735 ideal for high-speed stainless steel turning where heat buildup is the primary cause of tool failure.
Q3: Is this insert compatible with boring bars?
A: Yes, it fits any SWLCR or SWGCR holder designed for 04-size trigon inserts.
Pro-Tip: US735 vs. VP15TF
Choose US735 for high-productivity environments where heat resistance is key. If you are doing precision miniature turning with very low cutting speeds, you might consider our VP15TF grade, but for standard industrial stainless steel turning, US735 remains the champion.
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.