Mitsubishi CNMG120408-MS US735 Stainless Steel Turning Insert (10pcs)
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CNMG120408-MS US735
The Stainless Powerhouse | US735 Tough PVD | MS Chip Control Geometry
Optimized for Tough, Gummy Materials
US735 Grade (Impact & Thermal Specialist): The US735 is a premium PVD-coated grade designed to solve the most common problems in M-Class (Stainless Steel) machining. Its substrate is engineered for high impact strength, making it the top choice for interrupted cuts or applications where thermal cracking typically occurs. The thin, tough PVD coating allows the edge to remain sharp while resisting the chemical wear inherent in stainless alloys.
MS Chipbreaker (Stainless Logic): The MS geometry is specifically designed to handle the high ductility of stainless steel. It features a large rake angle and a unique chip-pocket design that forces chips to break even at lower feeds, preventing the dreaded "long stringers" that can damage workpieces and tool holders.
0.8mm (1/32") Balanced Radius: The 08 radius is the perfect "middle-ground" for any machine shop. It is strong enough for light-to-medium roughing and sharp enough to provide an excellent industrial surface finish on a wide variety of alloyed steels.
Metric vs. Imperial Comparison
| System | Model Designation | I.C. (Inscribed Circle) | Thickness | Radius (RE) |
|---|---|---|---|---|
| Metric | CNMG120408-MS | 12.7 mm | 4.76 mm | 0.80 mm |
| Imperial | CNMG432-MS | 1/2" | 3/16" | 0.0315" (1/32") |
High-Toughness Cutting Parameters
*The US735 grade is optimized for reliability. Use flood coolant to prevent edge welding in stainless steel applications.
| Workpiece Material | Speed (Vc) | Feed (fn) | Depth (Ap) |
|---|---|---|---|
| Austenitic Stainless (304/316) | 70 - 160 m/min | 0.10 - 0.30 mm/r | 0.50 - 3.50 mm |
| Alloy Steels (High Strength) | 100 - 180 m/min | 0.12 - 0.35 mm/r | 0.80 - 4.00 mm |
Compatible Tool Holders
Maximum rigidity is recommended for stainless steel. Fits DCLNR/L 12 and MCLNR/L 12 series holders:
Shop DCLNR 12 HoldersPro-Tip: US735 vs. VP15TF
US735 (The Tough Specialist): This is your primary choice for interrupted cuts and unstable machine conditions in stainless steel. It prioritizes toughness over pure speed.
VP15TF (The Speed Specialist): Switch to VP15TF for continuous, high-speed turning in stable conditions. VP15TF offers slightly higher wear resistance but is more prone to chipping in heavy interruptions.
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