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
Absolutely. Our CNC carbide inserts (including CNMG, WNMG, DNMG, and APMT series) are manufactured strictly adhering to international ISO/ANSI specifications. A CNMG 120408 from OYYU BEYOND will flawlessly fit any standard turning tool holder or indexable tool from major global brands like Sandvik Coromant, Kennametal, Iscar, Walter, or SECO, providing a highly cost-effective premium alternative without sacrificing tolerance or tool life.
We offer optimized CVD and PVD multi-layer coatings for different ISO material groups:
- For Carbon/Alloy Steel (ISO P): Choose our thick multi-layer CVD coated grades (e.g., Al2O3 + TiN). They provide exceptional crater wear resistance and thermal barriers during high-speed dry or wet roughing.
- For Stainless Steel (ISO M): Choose our nano-structured PVD coated grades with sharp, positive chipbreakers (like -TM or -MA). This combination prevents work hardening and effectively controls sticky chips.
The optimal cutting parameters vary depending on the workpiece hardness and operation type:
- For General Steel Turnings: Recommended cutting speed ($V_c$) ranges from 150 to 280 m/min, with a feed rate ($f$) of 0.15 to 0.45 mm/rev.
- For Stainless Steel Finishing: Recommended cutting speed ($V_c$) is 120 to 200 m/min, with a feed rate ($f$) of 0.10 to 0.25 mm/rev.Always adjust parameters based on early wear patterns: increase $V_c$ if built-up edge occurs, or reduce $V_c$ if severe flank wear is observed.
Yes, we support machine shops, distributors, and global buyers with tiered wholesale pricing and competitive volume discounts. We also provide OEM custom manufacturing solutions for tool holders and carbide inserts based on your technical drawings. Contact our team to request a quick B2B quotation.
We provide secure worldwide express shipping (via DHL, FedEx, and UPS) with specialized, vibration-proof industrial packaging to ensure tools arrive in perfect condition. In-stock items are dispatched within 24-48 hours, while custom or bulk orders typically have a stable lead time of 15-25 days.
All our cutting tools and tool holders are manufactured strictly in accordance with ISO 9001 and international industrial standards. Every batch undergoes 100% rigorous quality control testing using high-precision optical measuring equipment to ensure reliable tool life and stable performance in continuous mass production.