Mitsubishi WCMT020104 AP25N Cermet Inserts for Steel Finishing
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MITSUBISHI WCMT020104 AP25N
PVD Coated Cermet Grade | Mirror Finish Steel Specialist
Product Overview
The Mitsubishi WCMT020104 AP25N is a specialized 80° trigon turning insert designed for the high-precision finishing of steel. Unlike standard carbide, the AP25N PVD coated cermet grade features high chemical stability and superior resistance to built-up edge (BUE). This ensures an exceptional, mirror-like surface finish and tight dimensional tolerances, making it indispensable for precision CNC lathe operations in carbon and alloy steels.
ISO Model Designation Guide
Trigon 80°
7° Relief
Tolerance
Hole/Chip
IC 3.97mm
Thick 1.59mm
Radius 0.4mm
Metric vs. Imperial Comparison
| Technical Features | Metric (ISO) | Imperial (ANSI) |
|---|---|---|
| Model Number | WCMT 020104 | WCMT 1.21.21 |
| Inscribed Circle (IC) | 3.97 mm | 0.156 inch |
| Corner Radius | 0.4 mm | 0.016 inch |
Recommended Cutting Parameters
Optimized for Finishing Steel (High Vc):
- Cutting Speed (Vc): 150 - 450 m/min (High speed ensures better finish)
- Feed Rate (f): 0.05 - 0.15 mm/rev
- Depth of Cut (ap): 0.1 - 0.8 mm
*Note: Cermet grades perform best at high speeds to prevent adhesion.
Material: AP25N PVD Coated Cermet
The AP25N grade is a fusion of ceramic and metal, enhanced by a precision PVD coating. It offers a unique combination of abrasion resistance and toughness. This grade is specifically designed to machine at higher velocities than standard carbide while maintaining a sharp cutting edge, which is the key to achieving high-mirror finishes in steel components.
Geometry & Chipbreaker Performance
The WCMT geometry is a positive, 7-degree relief design. This reduces the cutting force and heat transfer to the workpiece, significantly improving tool life during light finishing passes. It is engineered for clean chip evacuation in precision turning of automotive and medical-grade steel parts.
Compatible Holders:
Shop SWLCR / SWGCR Boring BarsGlobal Customer Feedback
⭐⭐⭐⭐⭐ "Mirror finish reached!" - Julien B., France
"Using AP25N for finishing alloy steel shafts. The surface is so reflective we almost don't need grinding. Incredible quality."
⭐⭐⭐⭐⭐ "Authentic Mitsubishi" - Steve K., UK
"Original packaging and the performance matches the catalog. These cermet inserts last a long time in finishing passes."
⭐⭐⭐⭐ "Great for precision" - Yuki H., Japan
"Very stable dimensions even after a full day of machining. AP25N is my go-to for final dimensions."
⭐⭐⭐⭐⭐ "Cost-effective" - Markus L., Germany
"Lower cost per part than high-end European brands for the same finish. Fast delivery."
⭐⭐⭐⭐⭐ "Highly Recommended" - Ryan P., Australia
"Clean cuts and very low vibration. Perfect for my small CNC lathe projects."
Technical Q&A
Q: Can I use AP25N for roughing?
A: We do not recommend this. Cermet is brittle compared to carbide. It is optimized for light finishing. Use a carbide grade like UE6110 for roughing.
Q: Is this insert compatible with boring bars?
A: Yes, it fits any SWLCR or SWGCR holder that uses 02-size trigon inserts.
Q: Does it work on stainless steel?
A: AP25N can work on some stainless steels for finishing, but MC7025 or US735 are generally better suited for heat-resistant alloys.
Material Tip: Why Cermet?
Choose AP25N Cermet over carbide when surface quality is your top priority. Cermet’s low affinity for steel prevents the material from "welding" to the tip, resulting in a cleaner cut and a more reflective finish.
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.