Mitsubishi CNMG120412-GH US735 Roughing Insert for Stainless Steel (10pcs)
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CNMG120412-GH US735
Stainless Heavy Rougher | US735 Toughness | 1.2mm Reinforced Edge
The Ultimate Solution for Interrupted Stainless Steel Cuts
US735 Grade (Impact Resilience): The US735 is a specialized CVD-coated grade designed specifically for M-Class (Stainless Steel) applications. Unlike PVD grades which prioritize sharpness, US735 utilizes a high-toughness substrate that resists thermal cracking and mechanical chipping. It is the "safety first" grade for machining through scale, welds, or heavy interruptions where other inserts shatter.
GH Chipbreaker (Structural Power): The GH geometry is Mitsubishi's most robust roughing profile. It features a wide, negative land (T-land) that reinforces the cutting edge. This design prevents the "notching" wear commonly seen when roughing stainless steel and allows for massive chip loads without compromising the tool's structural integrity.
1.2mm (3/64") Corner Radius: The 1.2mm radius offers superior heat dissipation compared to smaller radii. It allows for significantly higher feed rates and provides a much stronger tip for plowing through the work-hardened skin of austenitic stainless steel.
Metric vs. Imperial Comparison
| System | Model Designation | I.C. (Inscribed Circle) | Thickness | Radius (RE) |
|---|---|---|---|---|
| Metric | CNMG120412-GH | 12.7 mm | 4.76 mm | 1.20 mm |
| Imperial | CNMG433-GH | 1/2" | 3/16" | 0.0472" (3/64") |
Heavy Roughing Cutting Parameters
*The 1.2mm radius is built for heavy feeds. Always use high-volume coolant to prevent heat buildup on the cutting edge.
| Workpiece Material | Speed (Vc) | Feed (fn) | Depth (Ap) |
|---|---|---|---|
| Stainless Steel (304/316) | 60 - 150 m/min | 0.25 - 0.50 mm/r | 1.50 - 5.50 mm |
| Duplex Stainless / Alloys | 40 - 100 m/min | 0.20 - 0.40 mm/r | 1.00 - 4.50 mm |
Compatible Tool Holders
Maximum rigidity is mandatory for heavy 1.2mm radius roughing. Fits DCLNR/L 12 series holders:
Shop DCLNR 12 HoldersPro-Tip: US735 vs. VP15TF
US735 (The Heavy-Duty Guardian): Use this when your primary failure is edge breakage. It is far tougher than VP15TF but operates at slightly lower speeds. Perfect for rough castings.
VP15TF (The Precision Runner): Choose VP15TF for continuous turning at higher speeds to achieve better surface finish and tool life in stable environments.
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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.