Mitsubishi CCMT060204 AP25N Cermet Finishing Insert for Steel (10pcs)
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CCMT060204 AP25N
Steel Finishing Specialist | TiCN Cermet | 0.4mm Edge Radius
Material & Geometry Analysis
AP25N Grade (Uncoated Cermet): This Titanium Carbonitride (TiCN) cermet grade is designed for high-speed finishing of steel. Because cermets have a low chemical affinity for steel, they resist Built-Up Edge (BUE) far better than tungsten carbide. This results in a mirror-like surface gloss and maintains tight dimensional tolerances even during long-duration continuous cuts.
80° Positive Rhombic Geometry: The CCMT shape is a 7° positive relief insert that generates low cutting resistance. This is critical for Internal Boring where tool deflection must be minimized. The 0.4mm radius is the optimal balance between edge toughness and fine surface finish.
Metric vs. Imperial Comparison
| System | Model Designation | I.C. (Inscribed Circle) | Thickness | Radius (RE) |
|---|---|---|---|---|
| Metric | CCMT060204 | 6.35 mm | 2.38 mm | 0.40 mm |
| Imperial | CCMT21.51 | 0.250" (1/4") | 0.0937" (3/32") | 0.0157" (1/64") |
Recommended Cutting Parameters
*AP25N excels in dry machining. High cutting speeds (Vc) are necessary to achieve the best surface results.
| Workpiece Material | Speed (Vc) | Feed (fn) | Depth (Ap) |
|---|---|---|---|
| Carbon Steel (S45C) | 150 - 320 m/min | 0.05 - 0.20 mm/r | 0.15 - 1.20 mm |
| Alloy Steel (4140) | 120 - 280 m/min | 0.05 - 0.15 mm/r | 0.15 - 1.00 mm |
Required Tool Holder
Standard compatibility with all SCLCR/L external tools and boring bars:
Shop SCLCR 06 HoldersPro-Tip: AP25N vs NX2525
AP25N: Optimized for Steel finishing. It offers a slightly tougher substrate than NX2525, making it better for semi-finishing or when the cut is not perfectly continuous.
NX2525: Use this for ultra-precision finishing when you need the highest possible gloss. It is harder but more brittle than AP25N. If you experience edge chipping, switch back to AP25N.
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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.