ZCC.CT DNMG150612-15 YBC251 Carbide Turning Inserts for Steel
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DNMG150612-15 YBC251 Heavy-Duty Steel Turning Inserts
Product Overview
The DNMG150612-15 YBC251 is a high-toughness carbide insert engineered for the Steel (P-Class) application range. The YBC251 grade—featuring a thick Al2O3 CVD coating—is the "Workhorse" of the ZCC.CT line, balancing wear resistance and impact toughness. Combined with the -15 geometry (designed for roughing and heavy-duty machining), this insert excels in high-feed environments and handles interrupted cuts with ease.
Core Technical Advantages
- ✅ YBC251 Versatile Grade: Ideal for P20–P35 steel applications, providing stable performance in semi-finishing to roughing.
- ✅ -15 Chipbreaker: Specifically designed with a wide chip pocket for high-feed roughing, effectively controlling chips at large depths of cut.
- ✅ 1.2mm Nose Radius: Provides maximum edge strength (R1.2) to withstand heavy mechanical loads and high-temperature stress.
- ✅ CVD Multi-Layer Coating: Offers superior thermal protection for the carbide substrate during long-cycle continuous cutting.
Technical Specifications
55° Shape
0° Relief
Tolerance
Pin/Hole
15.5mm L
6.35mm S
1.2mm R
| Unit System | Model Reference | Nose Radius |
|---|---|---|
| Metric (ISO) | DNMG150612-15 | 1.2 mm |
| Inch (ANSI) | DNMG 443-15 | 0.0472" |
Recommended Cutting Parameters (Steel)
| Workpiece (P) | Speed (Vc) | Feed (fn) |
|---|---|---|
| Carbon/Alloy Steel | 180 - 350 m/min | 0.25 - 0.65 mm/rev |
Primary Applications
- Medium to Large Batch Steel Production
- Heavy Roughing of Carbon Steel (S45C/1045)
- Alloy Steel Machining (4140/SCM440)
- Interrupted Cutting and Casting Skin Removal
Machine Compatibility
- High-Rigidity CNC Lathes
- Heavy-Duty Manual Lathes
- Standard ISO DNMG Tool Holders
ZCC.CT Grade Strategy for Steel (P)
| Grade | Focus | Cutting Condition |
|---|---|---|
| YBC151 | Finishing | Stable / High Speed |
| YBC251 (Current) | General Purpose | Versatile / Most Reliable |
| YBC351 | Roughing | Heavy Interrupted / Low Speed |
Customer Success Stories
⭐⭐⭐⭐⭐
"Excellent edge life for roughing 4140. The 1.2mm radius holds up perfectly under heavy load."
— Thomas J., USA 🇺🇸⭐⭐⭐⭐⭐
"Der Spanbruch ist bei hohem Vorschub fantastisch. YBC251 ist sehr zuverlässig."
— Hans W., Germany 🇩🇪⭐⭐⭐⭐
"Solid performance on interrupted cuts. Best value for money compared to Japanese brands."
— Marco V., Italy 🇮🇹⭐⭐⭐⭐⭐
"Great tool life on our CNC machines. We use these for almost all our carbon steel jobs."
— Kenji A., Japan 🇯🇵Frequently Asked Questions
Q: Is YBC251 suitable for dry machining?
A: While CVD coatings handle heat well, we recommend using coolant for steel roughing to improve chip evacuation and surface quality.
Q: What is the main advantage of the -15 chipbreaker?
A: It is designed for rough machining (P2-P3). It provides a strong cutting edge and excellent chip control at higher feeds and depths of cut.
Q: Why choose the 1.2mm radius (12) over 0.8mm (08)?
A: The 1.2mm radius significantly increases edge strength for roughing, though it requires a more rigid machine to avoid vibration.
Industrial Insight: YBC251 is the ultimate general-purpose grade. If you face heavy vibrations, ensure your tool overhang is minimized. For precision finishing after roughing with this insert, consider moving to the YBC151 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.