Mitsubishi CNMG120404-MA US735 Stainless Steel Turning Insert (10pcs)
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CNMG120404-MA US735
Stainless Steel Specialist | US735 PVD Grade | MA Chipbreaker
Engineered for Tougher Alloys
US735 Grade (The Toughness Champion): US735 is a specialized PVD-coated carbide grade designed for **Stainless Steel (M-Class)** and **Heat Resistant Alloys (S-Class)**. Unlike CVD grades that can be brittle, the PVD coating on US735 is thinner and more elastic, providing extreme resistance to chipping and thermal cracking during interrupted cuts or when machining materials that work-harden quickly.
MA Chipbreaker (Medium-Cut Precision): The **MA chipbreaker** is Mitsubishi's most versatile geometry for medium turning. It features a unique ridge design that ensures stable chip breaking across a wide range of feed rates, specifically preventing long, dangerous "string" chips common in 304 and 316 stainless steel.
0.4mm (1/64") Precision Radius: The 04 radius reduces radial cutting forces, making it ideal for finishing passes, small-diameter workpieces, and thin-walled parts where vibration (chatter) must be eliminated.
Metric vs. Imperial Comparison
| System | Model Designation | I.C. (Inscribed Circle) | Thickness | Radius (RE) |
|---|---|---|---|---|
| Metric | CNMG120404-MA | 12.7 mm | 4.76 mm | 0.40 mm |
| Imperial | CNMG431-MA | 1/2" | 3/16" | 0.0157" (1/64") |
Recommended Cutting Parameters
*Stainless steel requires consistent feed to avoid work-hardening. Flood coolant is highly recommended.
| Material Group | Speed (Vc) | Feed (fn) | Depth (Ap) |
|---|---|---|---|
| Austenitic Stainless (304/316) | 80 - 180 m/min | 0.10 - 0.25 mm/r | 0.30 - 2.50 mm |
| Heat Resistant Alloys (Inconel) | 30 - 60 m/min | 0.08 - 0.20 mm/r | 0.20 - 1.50 mm |
Required Tool Holders
Maximum clamping stability for DCLNR/L 12 and MCLNR/L 12 series holders:
Shop DCLNR 12 HoldersPro-Tip: US735 vs. VP15TF
US735 (High Toughness): Best for heavy interruptions, low-speed machining, and materials with high work-hardening tendencies. Use this if your inserts are currently chipping.
VP15TF (General Purpose): Use this for higher-speed continuous turning in a wider variety of materials. It is harder than US735 but less resistant to impact.
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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.