Mitsubishi RCMX1204MO US735 Round Turning Insert | MMC Japan
30-Day Free Returns
Free Worldwide Shipping
RCMX1204MO US735
Mitsubishi Materials | Heavy-Duty Stainless & Tough Alloy Specialist
The Mitsubishi RCMX1204MO US735 is a high-toughness, 12mm round turning insert designed for the most challenging stainless steel machining tasks. Featuring the legendary US735 CVD coating, this insert is built to survive interrupted cutting and unstable machining environments where standard grades fail. Its circular geometry makes it the premier choice for profiling, copy turning, and heavy-duty roughing of austenitic stainless steels and heat-resistant super alloys.
Technical Specifications
| ISO Designation | RCMX1204MO |
|---|---|
| ANSI Designation | RCMX 43 MO |
| Grade / Coating | US735 (High-TRS CVD Carbide) |
| Inscribed Circle ($IC$) | 12.0 mm (0.472") |
| Thickness ($S$) | 4.76 mm (0.187") |
US735 Grade Toughness
The US735 grade is engineered for high shock resistance. It combines a robust carbide substrate with a specialized CVD coating that prevents notch wear and thermal cracking. This makes it ideal for machining stainless steel (M-class) when facing heavy scale or inconsistent hardness, effectively absorbing the impact of interrupted cuts during roughing.
MO Chipbreaker Geometry
The MO chipbreaker is designed for medium-to-heavy applications. Its reinforced cutting edge is optimized for indexable turning, offering stability across a wide range of feed rates. The round shape provides an "infinite" number of nose radii, which lowers the cutting resistance and allows for massive surface finish improvements even at higher feed per revolution.
Recommended Cutting Parameters
Primary Material: Stainless Steel & High-Temp Alloys (M25-M40)
| Workpiece Material | Cutting Speed ($v_c$) | Feed per Rev ($f$) |
|---|---|---|
| 300 Series Stainless (304/316) | 60 - 130 m/min | 0.15 - 0.40 mm/rev |
| Duplex Stainless Steel | 40 - 80 m/min | 0.12 - 0.30 mm/rev |
| Inconel / Titanium Alloys | 25 - 55 m/min | 0.10 - 0.25 mm/rev |
SRDC / PRDCN HOLDER COMPATIBILITY
For heavy-duty profiling, mount the RCMX1204MO on Mitsubishi SRDC or PRDCN tool holders.
View Compatible Holders →Metric vs. Inch Cross-Reference
| Feature | Metric (ISO) | Inch (ANSI) |
|---|---|---|
| Insert Diameter | 12 (12.0 mm) | 4 (4/8" or 0.472") |
| Thickness | 04 (4.76 mm) | 3 (3/16" or 0.187") |