Mitsubishi CNMG120404 NX2525 Cermet Finishing Insert for Steel (10pcs)
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CNMG120404 NX2525
High-Speed Finishing Master | NX2525 Cermet Grade | Mirror Finish
The Cermet Advantage: NX2525 Grade
NX2525 Cermet Grade: Mitsubishi’s NX2525 is a high-performance Cermet grade (Titanium Carbonitride based). Because cermet has a low affinity for workpiece materials like steel and stainless steel, it eliminates the "sticking" effect. This ensures that the insert maintains a sharp cutting edge for much longer than coated carbide, delivering superior surface brightness (Ra values) and high-speed stability.
Standard CNMG Chipbreaker: This insert features a precision-engineered chipbreaker designed for finishing and semi-finishing operations. It effectively controls chip flow at shallow depths of cut, preventing long, stringy chips from tangling around the workpiece or tool holder.
0.4mm (1/64") Radius: The 04 radius is the specialist for Precision Finishing. It generates lower radial cutting forces, which is essential for machining thin parts or maintaining tight tolerances without vibration or chatter.
Metric vs. Imperial Comparison
| System | Model Designation | I.C. (Inscribed Circle) | Thickness | Radius (RE) |
|---|---|---|---|---|
| Metric | CNMG120404 | 12.7 mm | 4.76 mm | 0.40 mm |
| Imperial | CNMG431 | 1/2" | 3/16" | 0.0157" (1/64") |
Recommended Cutting Parameters
*Cermet thrives at high surface speeds. For best results, use dry cutting or flood coolant; avoid intermittent cooling to prevent thermal shock.
| Material Group | Speed (Vc) | Feed (fn) | Depth (Ap) |
|---|---|---|---|
| Carbon Steel / Alloy Steel | 150 - 400 m/min | 0.05 - 0.20 mm/r | 0.20 - 1.50 mm |
| Stainless Steel (Finishing) | 120 - 250 m/min | 0.05 - 0.15 mm/r | 0.20 - 1.00 mm |
Compatible Tool Holders
Engineered for DCLNR/L 12 and MCLNR/L 12 series Turning Tools:
Shop DCLNR 12 HoldersPro-Tip: Cermet vs. Coated Carbide
NX2525 (Cermet): The Finishing Specialist. Use this when your priority is the highest surface finish quality and dimensional precision. It excels in stable, high-speed continuous cuts.
VP15TF (Coated Carbide): The Toughness King. Switch to coated carbide if you are performing heavy roughing or dealing with interrupted cuts, as Cermet is more brittle than carbide.
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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.