Mitsubishi CNMG190612-MA US735 Heavy Duty Stainless Steel Insert (10pcs)
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CNMG190612-MA US735
Heavy Roughing Titan | US735 PVD Grade | MA Medium-Heavy Geometry
Built for Extreme Scale & Heavy Roughing
US735 Grade (The Impact Specialist): When machining large stainless steel parts, heat and scale are the enemies. The US735 PVD-coated grade is designed with an ultra-tough substrate that absorbs mechanical shock. Its specialized coating layer prevents "notch wear" at the depth-of-cut line, a common failure point in Austenitic Stainless Steels.
MA Chipbreaker (Controlled Power): The MA geometry on this 19mm insert is scaled for medium-to-heavy depths of cut. It balances a sharp cutting action to reduce work-hardening with a strong land area that supports the cutting edge during aggressive metal removal.
1.2mm (3/64") Roughing Radius: The 12 radius is essential for heavy-duty turning. It provides maximum corner strength to withstand the high radial forces generated during deep cuts (up to 8mm depth) while maintaining tool integrity through interrupted sections.
Metric vs. Imperial Comparison
| System | Model Designation | I.C. (Inscribed Circle) | Thickness | Radius (RE) |
|---|---|---|---|---|
| Metric | CNMG190612-MA | 19.05 mm | 6.35 mm | 1.20 mm |
| Imperial | CNMG643-MA | 3/4" | 1/4" | 0.0472" (3/64") |
Heavy-Duty Cutting Parameters
*Due to the 19mm size, ensure your machine has high torque and the tool holder is a rigid double-clamp type.
| Material Group | Speed (Vc) | Feed (fn) | Max Depth (Ap) |
|---|---|---|---|
| 304/316 Stainless Steel | 60 - 140 m/min | 0.25 - 0.60 mm/r | 1.50 - 8.00 mm |
| Duplex Stainless / Inconel | 20 - 50 m/min | 0.20 - 0.45 mm/r | 1.50 - 5.00 mm |
Heavy-Duty Tool Holders
Engineered for DCLNR/L 19 or MCLNR/L 19 series (3232 or 4040 shank sizes recommended):
Shop DCLNR 19 HoldersPro-Tip: When to choose the 1906 size?
CNMG190612 (The Power Choice): Use this when your depth of cut exceeds 5mm or when machining large diameter shafts. The thicker 6.35mm insert body dissipates heat much better than the standard 1204 series.
Interrupted Cuts: US735 is legendary for handling heavy interruptions. If your 19mm inserts are breaking due to impact, ensure you are using a Double Clamp (D-Type) holder for maximum security.
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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.