Mitsubishi SPMW090304 UTI20T | Carbide Milling Insert for Steel
Price shown is a starting point. Contact us for a precise quote based on your requirements.
SPMW090304 UTI20T
Mitsubishi Materials | Reliable Toughness for General Machining
The Mitsubishi SPMW090304 UTI20T is a versatile indexable carbide insert designed for general-purpose milling. Utilizing the highly durable UTI20T grade, this insert excels in environments where edge toughness is paramount. It is the perfect long-tail solution for stainless steel, alloy steel, and cast iron, providing stable performance in both manual machines and CNC centers.
ISO Code Breakdown
Square
11° Relief
M-Class Tol.
Fixing Hole
9.525mm Size
3.18mm Thick
0.4mm Rad.
Dimensional Comparison
| Parameter | Metric (ISO) | Inch (ANSI) Equivalent |
|---|---|---|
| Model Number | SPMW090304 | SPMW 32.51 |
| Inscribed Circle ($IC$) | 9.525 mm | 0.375" |
| Thickness ($S$) | 3.18 mm | 0.125" |
| Nose Radius ($RE$) | 0.4 mm | 0.016" |
Grade: UTI20T Uncoated Carbide
UTI20T is a high-toughness, PVD uncoated carbide grade. It is specifically formulated to withstand high mechanical shocks and vibrations, making it far more reliable than cermet or brittle carbides in interrupted cutting. It provides exceptional edge stability when machining stainless steels (300/400 series) and gray cast iron.
Geometry: W-Type General Purpose
The W-Type geometry refers to the countersunk mounting hole. This insert features a sharp cutting edge without a heavy molded chipbreaker, allowing for clean shearing and lower cutting forces. It is the preferred choice for manual milling machines and medium-speed CNC finishing.
Cutting Parameter Recommendations
| Workpiece Material | Speed ($v_c$) | Feed per Tooth ($f_z$) |
|---|---|---|
| Carbon Steel / Alloy Steel | 100 - 180 m/min | 0.10 - 0.25 mm/t |
| Stainless Steel | 60 - 130 m/min | 0.08 - 0.20 mm/t |
| Cast Iron | 80 - 150 m/min | 0.15 - 0.35 mm/t |
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.