Mitsubishi SCMT09T308 US735 Carbide Insert | Genuine MMC Japan
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SCMT09T308 US735
Mitsubishi Materials | The Stainless Steel & Interrupted Cut Expert
The Mitsubishi SCMT09T308 US735 is a high-toughness indexable turning insert specifically engineered for difficult-to-cut materials. Utilizing the US735 CVD coating, this insert is the industry standard for stainless steel turning and heavy interrupted cuts. Its 0.8mm nose radius provides a robust cutting edge that resists chipping, making it the primary choice for CNC machining where stability and edge reliability are more critical than pure speed.
ISO Designation Decoded
Square 90°
7° Relief Angle
M-Class Tolerance
Countersink Hole
9.525mm Size
3.97mm Thick
0.8mm Radius
Technical Specifications
| Feature | Metric Designation | Inch (ANSI) Designation |
|---|---|---|
| Model Name | SCMT09T308 | SCMT 32.52 |
| Inscribed Circle ($IC$) | 9.525 mm | 3/8" |
| Thickness ($S$) | 3.97 mm | 5/32" |
| Nose Radius ($R_e$) | 0.8 mm | 1/32" |
US735 Grade Toughness
The US735 grade is Mitsubishi's premium solution for austenitic stainless steels and interrupted cutting. It features a specialized TiCN + Al2O3 + TiN CVD coating on a highly fracture-resistant substrate. This grade is specifically designed to prevent thermal cracking and notch wear, common issues when lathe machining stainless steel.
Versatile S-Type Geometry
As a square insert with a 7-degree positive relief angle, the SCMT shape reduces cutting resistance and power consumption. The 0.8mm radius (08) offers a heavy-duty edge that supports higher feed rates, ensuring efficient chip evacuation and preventing the dreaded "work hardening" of the stainless steel surface.
Recommended Cutting Parameters
Primary Application: Stainless Steel & Tough Alloys (M10 - M30)
| Material Group | Cutting Speed ($v_c$) | Feed Rate ($f$) | Depth of Cut ($a_p$) |
|---|---|---|---|
| Austenitic Stainless (304/316) | 80 - 180 m/min | 0.12 - 0.30 mm/rev | 0.5 - 3.0 mm |
| Duplex Stainless Steel | 60 - 120 m/min | 0.10 - 0.25 mm/rev | 0.5 - 2.5 mm |
LATHE TOOL HOLDER COMPATIBILITY
The SCMT09T3 series is designed for Mitsubishi SSDCN external holders or SSBCR/L boring bars.
View Matching Holders →
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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.