ZCC.CT SNMG190612 YBC251 Carbide Turning Inserts for Steel Machining
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ZCC.CT SNMG190612 YBC251 Turning Insert
Professional CVD Coated Carbide for Steel Semi-Finishing
Product Overview
"Which CNC insert is best for stable semi-finishing of carbon steel and alloy steel with high efficiency?"
The ZCC.CT SNMG190612 YBC251 is a premier industrial solution designed for the demanding requirements of steel turning (ISO P). Utilizing the YBC251 grade—a multi-layer CVD coating (TiCN + Thick Al2O3)—this insert provides a perfect balance between wear resistance and impact toughness. It is specifically engineered to handle medium-speed cutting while maintaining a superior surface finish.
Key Performance Advantages
Technical Specifications
Square
0° Relief
Tolerance
Hole/Chip
19.05mm
6.35mm
1.2 Radius
| Standard | Metric Designation | Imperial Designation |
|---|---|---|
| ISO / ANSI | SNMG190612 | SNMG643 |
Recommended Machining Parameters
| Workpiece Material | Cutting Speed (Vc m/min) | Feed Rate (fn mm/rev) |
|---|---|---|
| Carbon Steel / Alloy Steel | 150 - 320 | 0.15 - 0.50 |
| Cast Iron | 120 - 280 | 0.20 - 0.55 |
Compatible Tool Holders (SNMG 1906 Series):
Applications
- Materials: Primarily for Carbon Steel, Alloy Steel, and Cast Iron.
- Process: Semi-finishing and light roughing operations.
- Environment: Suitable for both continuous and interrupted cutting.
Compatibility
Fits all standard ISO external and internal tool holders with 1906 (643) pocket size. Compatible with high-power CNC lathes and large-scale machining centers.
ZCC.CT Steel Turning Grade Matrix
| Grade | Type | Application |
|---|---|---|
| YBC151 | CVD | High Speed / Finishing |
| YBC251 | CVD | Semi-Finishing (Universal) |
| YBC351 | CVD | Heavy Roughing / Interrupted |
Why Professionals Choose Us
"Incredible tool life"
Replaced our more expensive Japanese inserts with ZCC.CT YBC251 for 1045 steel. Tool life is nearly identical at 40% less cost.
— Robert S., USA 🇺🇸"Beste Standzeit"
Sehr stabil bei semi-schlichten. Die Oberfläche ist perfekt.
— Hans G., Germany 🇩🇪"Ottimo prodotto"
Consegna veloce e inserti di alta qualità per tornitura di acciaio.
— Marco L., Italy 🇮🇹Expert Industrial FAQ
Q: Is the YBC251 grade suitable for stainless steel?
A: While YBC251 can machine some martensitic stainless steels, it is primarily optimized for ISO P (Steel). For austenitic stainless (like 304/316), we recommend the ZCC.CT YBM series.
Q: What is the benefit of the 1.2mm radius (SNMG190612)?
A: The 1.2mm radius provides increased edge strength and allows for higher feed rates compared to 0.4mm or 0.8mm, while still delivering an excellent semi-finish surface.
Q: Can this be used for dry machining?
A: Yes. The thick CVD Al2O3 layer provides excellent heat insulation, making it highly effective for dry turning operations at moderate speeds.
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.