Mitsubishi CNMG120408-MJ VP10RT Stainless & Alloy Turning Insert (10pcs)
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CNMG120408-MJ VP10RT
Stainless Specialist | VP10RT Miracle PVD | MJ Medium-Roughing Edge
Superior Performance in Heat-Resistant Materials
VP10RT Grade (The Miracle PVD): The VP10RT grade features Mitsubishi’s proprietary "Miracle" PVD coating. Unlike CVD coatings, this PVD layer is extremely smooth and thin, maintaining a sharp cutting edge while providing incredible heat resistance. It is specifically formulated to prevent "Built-up Edge" (BUE) and notch wear in Stainless Steel (M-class) and Super Alloys (S-class).
MJ Chipbreaker (Medium Cutting Stability): The MJ geometry is optimized for medium-duty cutting. It strikes a perfect balance between sharpness (to prevent work-hardening) and edge strength. The MJ breaker ensures consistent chip evacuation even in "gummy" materials like austenitic stainless steel, making it ideal for the most demanding CNC cycles.
0.8mm (1/32") Industry Standard Radius: The 0.8mm radius provides high thermal stability and edge robustness, making it suitable for a wide range of medium roughing and semi-finishing applications.
Metric vs. Imperial Comparison
| System | Model Designation | I.C. (Inscribed Circle) | Thickness | Radius (RE) |
|---|---|---|---|---|
| Metric | CNMG120408-MJ | 12.7 mm | 4.76 mm | 0.80 mm |
| Imperial | CNMG432-MJ | 1/2" | 3/16" | 0.0315" (1/32") |
Optimized Cutting Parameters
*VP10RT excels with high-pressure coolant. Lower speeds help extend tool life in Super Alloys.
| Workpiece Material | Speed (Vc) | Feed (fn) | Depth (Ap) |
|---|---|---|---|
| Stainless Steel (304/316) | 100 - 180 m/min | 0.15 - 0.40 mm/r | 1.00 - 4.00 mm |
| Inconel / Titanium Alloys | 30 - 70 m/min | 0.10 - 0.25 mm/r | 0.50 - 2.50 mm |
Recommended Tool Holders
Use high-clamping force holders like the DCLNR/L 12 series for difficult alloys:
Shop DCLNR 12 HoldersPro-Tip: VP10RT vs. US735
VP10RT (The Sharp Expert): Best for high-precision, heat-resistant alloys, and high-speed stainless turning. Provides superior edge sharpness and surface finish.
US735 (The Impact Fighter): Switch to US735 if you are dealing with heavy interruptions or scale-covered stainless castings where CVD toughness is required.
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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.