ZCC.CT APKT11T308-PM YBM251 Carbide Insert – 11mm Universal Milling R0.8 Steel
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APKT11T308-PM YBM251 ZCC.CT Milling Insert
High-Performance CVD Solution for Stainless Steel & Alloy Steel Milling
Product Overview
"Struggling with built-up edge and rapid wear when milling 304 or 316 stainless steel?"
The APKT11T308-PM YBM251 is specifically optimized for ISO M (Stainless Steel) and ISO P (Steel) groups. The PM (General Purpose) chipbreaker offers a sharp yet stable edge that reduces cutting resistance while ensuring smooth chip evacuation. Its core strength lies in the YBM251 Grade—a specialized CVD coating with high impact toughness and thermal stability, making it ideal for medium cutting speeds where surface finish and tool life are paramount.
Model Code Interpretation
90° Parallelogram
11° Clearance Angle
Hole & Chipbreaker
Size (11mm)
Thickness (3.97mm)
Radius (0.8mm)
General Purpose
Product Core Advantages
- Specialized YBM251 Grade: Engineered for superior toughness in stainless steel, preventing edge notch wear.
- Universal PM Geometry: The perfect balance between sharpness and stability for semi-finishing and medium cutting.
- CVD Thick Coating: Provides an excellent heat barrier, allowing for stable performance in high-friction materials.
- Industry Standard 0.8mm Radius: The most popular radius for multi-functional milling applications.
Application Scenarios
- Shoulder milling and face milling of 300 and 400 series stainless steels.
- Machining of alloy steels, tool steels, and pre-hardened steels.
- B2B heavy-duty production where tool reliability and cost-per-part are key.
- Suitable for machining environments with mild to moderate interruptions.
Technical Specifications & Cutting Data
| Metric Model | Inch Equivalent | Cutting Speed (Vc) | Feed per Tooth (fz) |
|---|---|---|---|
| APKT11T308-PM | APKT 0.433" x 0.156" R0.031" | 120 - 240 m/min | 0.10 - 0.28 mm/z |
*Ideal for Stainless Steel (M) and Alloy Steel (P) under diverse machining conditions.
Compatibility: Matching Tool Holders
Standard APKT 11-size. Precision fit for ZCC.CT and all standard indexable 90° milling cutters:
ZCC Grade Selection Logic
- YBM251 (This Product): Specialist for stainless steel and tough alloy roughing/medium cuts.
- YBM351: Maximum toughness for high-interruption stainless steel machining.
- YBG202: PVD grade for precision finishing and smaller parts.
Why Trust BEYOND / OYYU?
- ✅ 100% Original: Factory-fresh ZCC.CT inserts with full security QR code tracking.
- ✅ Direct Technical Support: Vetted by technical experts for professional CNC applications.
- ✅ B2B Logistics: Reliable global export with dedicated support for high-volume orders.
Global Verified Feedback
"YBM251 is my go-to for 304 stainless. It stays sharp much longer than the previous PVD inserts I was using."
Richard M. - USA"Gute Standzeit bei Edelstahl-Fräsen. ZCC Qualität ist wirklich beeindruckend für den Preis."
Hans B. - Germany"The PM chipbreaker handles chips beautifully. No nesting and very clean surfaces on alloy steel."
D. Wilson - UKTechnical FAQ
PM is a universal geometry for Medium Cutting. While it provides a good surface finish, for mirror-like precision finishing, you might consider the EM (Extra-Precision) geometry.
CVD coatings like YBM251 are thicker and offer better thermal insulation, which is crucial for high-speed machining where heat generation is high, common in stainless steel milling.
Stainless Steel Milling Tip:
When machining stainless steel with the PM chipbreaker, ensure a consistent feed rate to stay below the work-hardened layer of the material. If vibration occurs, reducing the cutting speed slightly or increasing the feed can often stabilize the cut and improve the tool life of the YBM251 grade.
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.