Mitsubishi CNMG120404-MA US735 Stainless Steel Turning Insert (10pcs)
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💰 Bulk savings 2-9 pcs · 6% OFF | 10+ pcs · 12% OFF
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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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.