ZCC.CT KNUX160405R11 YBM251 turning inserts for Stainless Steel
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ZCC.CT KNUX160405R11 YBM251 Turning Insert
Universal Stainless Steel Grade for Medium-Speed Efficiency
Product Overview
The ZCC.CT KNUX160405R11 in YBM251 grade is the "workhorse" of the stainless steel turning world. Designed for the ISO M20-M30 range, this insert features an advanced CVD multi-layer coating that specifically combats the work-hardening tendencies of stainless steel. The R11 chipbreaker geometry is engineered for aggressive chip evacuation at medium feeds, reducing heat buildup and preventing "bird-nesting" that can damage both the tool and the workpiece.
Key Advantages
- ✔ Versatile YBM251 Grade: Balances hard wear resistance with the toughness needed for light interruptions.
- ✔ Advanced CVD Coating: Thick coating layer provides excellent chemical stability and heat resistance.
- ✔ R11 Geometry: Optimized for Right-Hand cutting with superior chip control in ductile materials.
Technical Specifications
Decoding KNUX160405R11
Shape
Clearance
Tolerance
Special
Length
Thickness
Right/Chip
| Feature | Metric (mm) | Imperial (ANSI) |
|---|---|---|
| Cutting Edge Length (L) | 16.5 mm | KNUX 43-R11 |
| Thickness (S) | 4.76 mm | 0.187 in |
| Nose Radius (r) | 0.5 mm | 0.020 in |
Recommended Cutting Data
| Material Group | Speed (Vc) | Feed (fn) |
|---|---|---|
| Stainless (304/316) | 140 - 240 m/min | 0.12 - 0.35 mm/rev |
| Heat-Resistant Alloys | 40 - 80 m/min | 0.10 - 0.25 mm/rev |
Application Scope
- Automotive valve components.
- Chemical industry flanges & piping.
- General purpose stainless steel turning.
- Suitable for M20-M30 semi-finishing.
System Compatibility
- Fits all CNC Lathe ISO turrets.
- Optimized for Right-Hand Tool Blocks.
- Compatible with standard CVD tool cooling systems.
ZCC.CT Grade Choice for Stainless
| Grade | M-Range | Best Use Case |
|---|---|---|
| YBM251 (This) | M20 - M30 | General Purpose / Balanced |
| YBM351 | M30 - M40 | Heavy Roughing / Interrupted |
Trusted Globally by CNC Shops
⭐⭐⭐⭐⭐
"The YBM251 is my go-to for job shop work. It handles almost any stainless steel grade we throw at it."
— Mark P., USA 🇺🇸⭐⭐⭐⭐⭐
"Sehr zuverlässig. Die Standzeit beim Drehen von 1.4404 ist hervorragend."
— Dieter F., Germany 🇩🇪⭐⭐⭐⭐⭐
"Excellent finish on SS316 parts. R11 geometry clears chips perfectly."
— Stefano R., Italy 🇮🇹⭐⭐⭐⭐
"Good performance for the price. Very consistent results in mass production."
— Kenji T., Japan 🇯🇵Frequently Asked Questions
Q: Why choose YBM251 over YBM351?
A: YBM251 has higher wear resistance and is better for continuous cutting at higher speeds. YBM351 is tougher and better for roughing or heavy impact.
Q: Does the "R" mean it only works for right-hand tools?
A: Yes, "R" is for Right-Hand. This insert must be used with a matching right-hand tool holder for the chipbreaker to function correctly.
Q: Is this insert suitable for dry cutting stainless?
A: While the CVD coating can handle heat, we always recommend using high-pressure coolant with stainless steel to prevent work hardening and BUE.
Industrial Tech Tip: When machining austenitic stainless steel, always ensure your depth of cut (Ap) is greater than the nose radius of the insert to stay beneath the work-hardened surface layer.
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.