Mitsubishi CNMG120408-MM MC7025 Stainless Steel Turning Insert (10pcs)
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💰 Bulk savings 2-9 pcs · 6% OFF | 10+ pcs · 12% OFF
CNMG120408-MM MC7025
Medium-Cut Specialist | MC7025 Anti-Heat CVD | MM Edge Strength
Optimized for Tough Stainless Applications
MC7025 Grade (CVD Nano-Texture): Stainless steel turning generates concentrated heat at the cutting edge. The MC7025 grade utilizes a specialized Al2O3 nano-textured CVD coating that provides an ultra-smooth surface to prevent Built-Up Edge (BUE). This grade is engineered to resist chemical wear and notch wear, extending tool life significantly in Austenitic (300 series) and Duplex stainless steels.
MM Chipbreaker (Medium-Cut Geometry): The MM chipbreaker is the bridge between finishing and roughing. It features a medium-width land that provides the necessary edge toughness to handle variations in depth of cut while maintaining a sharp enough rake angle to prevent work-hardening of the stainless workpiece.
0.8mm (1/32") Performance Radius: The 08 radius is the global standard for medium turning. It offers excellent structural integrity for semi-roughing while providing a high-quality surface finish for final passes.
Metric vs. Imperial Comparison
| System | Model Designation | I.C. (Inscribed Circle) | Thickness | Radius (RE) |
|---|---|---|---|---|
| Metric | CNMG120408-MM | 12.7 mm | 4.76 mm | 0.80 mm |
| Imperial | CNMG432-MM | 1/2" | 3/16" | 0.0315" (1/32") |
Recommended Cutting Parameters
*Stainless steel requires constant chip load. Avoid rubbing; maintain the recommended feed rate for best results.
| Workpiece Material | Speed (Vc) | Feed (fn) | Depth (Ap) |
|---|---|---|---|
| Austenitic (304/316) | 120 - 210 m/min | 0.15 - 0.35 mm/r | 1.00 - 4.00 mm |
| Duplex Stainless Steel | 70 - 140 m/min | 0.12 - 0.25 mm/r | 0.80 - 3.00 mm |
Compatible Tool Holders
Ensure absolute rigidity for M-Class turning with DCLNR/L 12 series holders:
Shop DCLNR 12 HoldersPro-Tip: MC7025 vs. MP7035
MC7025 (Productivity First): A CVD grade designed for high-speed continuous cutting. It is the best choice for mass production where speed is prioritized.
MP7035 (Toughness First): A PVD grade. Switch to MP7035 for heavy interrupted cuts or when the machine spindle speed is low, causing edge chipping on CVD grades.
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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.