Mitsubishi SPMW090304 UTI20T | Carbide Milling Insert for Steel
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💰 Bulk savings 2-9 pcs · 6% OFF | 10+ pcs · 12% OFF
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 |
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This Mitsubishi insert is in stock. 24-hour quote response. ISO 9001 certified. Ships from Hangzhou in 3–7 days.
Technical FAQ & Buying Guide
When choosing CNC cutting tools, check the full model code, dimensions, grade and selected variant before ordering. Do not rely on the product image alone.
For carbide inserts, tool holders, drills and end mills, compare the mounting dimensions, connection type and manufacturer's specifications with your holder or machine. If you are unsure, share your existing part number and machining application with us before ordering.
Check the product listing for the selling unit, pack quantity and included components. If it is unclear whether the price is per piece or per pack, or whether a tool body and inserts are sold separately, contact us before purchasing.
Select cutting speed, feed rate and depth of cut using the relevant manufacturer's recommendations for your tool model, workpiece material, machine conditions and coolant method. The same settings are not suitable for every product or application.
Our automatic quantity discount is 6% off for 2–9 items and 12% off for 10 or more items, based on the total product quantity in the cart. Other offers may not combine with this discount; check the applicable offer conditions.
According to our shipping policy, orders are typically processed and shipped within 1–3 business days after confirmation. Delivery generally takes 5–20 business days, depending on your destination and shipping method. Customs clearance or unforeseen delays may affect delivery times. A tracking number is sent by email after shipment.