Mitsubishi CCMT120408 US735 Carbide Turning Insert for Stainless Steel (10pcs)
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CCMT120408 US735
Heavy-Duty Stainless Specialist | PVD Coated Carbide | 0.8mm Radius
Material & Chip Control Science
US735 Grade (The Stainless Specialist): Specifically engineered for ISO M (Stainless Steel) and ISO S (Heat-Resistant Alloys). The US735 utilizes a specialized PVD (Physical Vapor Deposition) coating that maintains high lubricity. This prevents the "gummy" chips of stainless from welding to the edge, significantly reducing Built-Up Edge (BUE) failures.
0.8mm Radius (High Feed Strength): The 08 radius (1/32") is the professional choice for semi-roughing to heavy finishing. It offers superior edge security, allowing you to push the feed rate (mm/rev) higher. This helps break the tough, stringy chips often found in austenitic stainless steels.
Metric vs. Imperial Comparison
| System | Model Designation | I.C. (Inscribed Circle) | Thickness | Radius (RE) |
|---|---|---|---|---|
| Metric | CCMT120408 | 12.70 mm | 4.76 mm | 0.80 mm |
| Imperial | CCMT432 | 0.500" (1/2") | 0.187" (3/16") | 0.0315" (1/32") |
Recommended Cutting Parameters
*The 0.8mm radius thrives under pressure. Avoid light "rubbing" cuts to prevent work-hardening.
| Workpiece Material | Speed (Vc) | Feed (fn) | Depth (Ap) |
|---|---|---|---|
| Stainless Steel (304/316) | 80 - 170 m/min | 0.12 - 0.35 mm/r | 0.50 - 2.50 mm |
| Duplex / Super Alloys | 40 - 90 m/min | 0.10 - 0.25 mm/r | 0.50 - 2.00 mm |
Required Tool Holder
Maximum rigidity for SCLCR/L 12 series external holders and boring bars:
Shop SCLCR 12 HoldersPro-Tip: US735 vs VP15TF
US735 (PVD): The Toughness Champion. Features a substrate designed specifically for high-shock applications and difficult gummy materials. Choose this for dedicated, high-volume stainless production.
VP15TF (PVD): The Versatile Specialist. If your machine switches frequently between carbon steel, cast iron, and stainless steel, VP15TF provides the best "one-size-fits-all" performance across ISO P, K, and M.
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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.