Mitsubishi CCMT120404 US735 Carbide Turning Insert for Stainless Steel (10pcs)
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CCMT120404 US735
Large-Scale Stainless Specialist | PVD Coated Carbide | 0.4mm Radius
Material Science & Precision Edge
US735 Grade (PVD Toughness): Engineered specifically for ISO M (Stainless Steel) and ISO S (Heat-Resistant Super Alloys). The PVD (Physical Vapor Deposition) coating maintains a razor-sharp edge, essential for slicing through gummy materials like 304 or 316 stainless without causing work-hardening. The substrate is a high-toughness carbide that resists thermal cracking and notch wear.
0.4mm Precision Radius (The Finisher's Choice): The 04 radius (1/64") is the standard for high-quality finishing. In this 12mm insert size, the geometry provides excellent chip control and low radial cutting forces, making it ideal for large-diameter boring and external finishing where surface roughness requirements are strict.
Metric vs. Imperial Comparison
| System | Model Designation | I.C. (Inscribed Circle) | Thickness | Radius (RE) |
|---|---|---|---|---|
| Metric | CCMT120404 | 12.70 mm | 4.76 mm | 0.40 mm |
| Imperial | CCMT431 | 0.500" (1/2") | 0.187" (3/16") | 0.0157" (1/64") |
Recommended Cutting Parameters
*US735 requires moderate speeds but positive feed rates to avoid work-hardening the workpiece surface.
| Workpiece Material | Speed (Vc) | Feed (fn) | Depth (Ap) |
|---|---|---|---|
| Stainless (304/316) | 90 - 180 m/min | 0.05 - 0.20 mm/r | 0.30 - 2.50 mm |
| Alloy Steel (Tough) | 120 - 220 m/min | 0.05 - 0.18 mm/r | 0.30 - 2.00 mm |
Compatible Tool Holders
Maximum performance for SCLCR/L 12 series external holders and boring bars:
Shop SCLCR 12 HoldersPro-Tip: US735 vs VP15TF
US735 (PVD): The Stainless Master. Features a tougher substrate and coating adhesion for gummy materials. Choose this for dedicated stainless production.
VP15TF (PVD): The Hybrid Grade. Excellent if your shop switches between carbon steel, cast iron, and stainless steel on the same CNC setup.
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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.