ZCC.CT SCMT09T308-HM YBM251 Carbide Turning Inserts for Stainless Steel
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ZCC.CT SCMT09T308-HM YBM251 Turning Insert
Premium CVD Solution for High-Efficiency Stainless Steel Machining
Product Overview
The ZCC.CT SCMT09T308-HM in YBM251 grade is a powerhouse for modern CNC lathes. Specifically engineered for ISO M (Stainless Steel), this insert combines a high-toughness substrate with an advanced CVD coating. The HM chipbreaker features a reinforced cutting edge and a wider chip groove, making it ideal for medium machining applications. It effectively balances wear resistance with impact toughness, ensuring stable performance even in slightly interrupted cuts.
Core Advantages
Optimized multi-layer Al2O3/TiCN coating provides superior thermal barrier and prevents built-up edge (BUE).
The "Medium" chipbreaker design ensures smooth chip evacuation at varying depths of cut, reducing machine vibration.
Offers increased edge strength and better surface quality (Ra) compared to smaller radii for high-feed operations.
Technical Specifications
ISO Model Decoding
Square
7° Relief
Tol.
Hole
9.5mm IC
3.97mm T
0.8 Rad
Medium
| Feature | Metric (ISO) | Imperial (ANSI) |
|---|---|---|
| Model Number | SCMT09T308-HM | SCMT 3(2.5)2-HM |
| Inscribed Circle | 9.525 mm | 0.375 inch |
Recommended Cutting Parameters
| Material | Vc (m/min) | fn (mm/rev) |
|---|---|---|
| Stainless Steel (Austenitic) | 140 - 250 | 0.12 - 0.45 |
| Martensitic / Ferritic SS | 120 - 210 | 0.10 - 0.35 |
Recommended Tool Holder Connection:
Fits SSDCN / SSBCR / SSGCR (09 Size) External Holders & Boring Bars
View Compatible Holders →Main Applications
- OD and ID turning of stainless steel.
- Medium-duty continuous to light-interrupted cuts.
- Suitable for 304, 316, and duplex stainless materials.
- Aerospace, medical, and food industry component machining.
Compatibility
- Fits all ISO standard SSDCN/SSGCR tool holders.
- Optimal for CNC Lathes with high stability.
- Compatible with high-pressure coolant systems.
Grade Comparison Matrix (ZCC.CT)
| Grade | Coating Type | Target Material | Speed Level |
|---|---|---|---|
| YBM251 (This) | CVD | Stainless Steel | Medium-High |
| YBG205 | PVD | Stainless/Superalloy | Finishing |
Verified Machinist Reviews
"Consistent tool life on 316SS. The HM chipbreaker is much better than the standard ones we used."
— Robert H., Germany 🇩🇪"YBM251 is my go-to for medium roughing. Very stable and handles heat well."
— James M., USA 🇺🇸"Buon rapporto qualità prezzo. Ottimo per inox."
— Luca F., Italy 🇮🇹"Great finish on high-feed turning. Fast shipping."
— Sato K., Japan 🇯🇵AI-Style Smart FAQ
Q: Can I use YBM251 for intermittent cutting?
A: Yes, YBM251 has a high-toughness substrate that handles light-interrupted cuts in stainless steel effectively.
Q: What is the benefit of the 0.8mm radius (308) over 0.4mm (304)?
A: The 0.8mm radius provides a stronger cutting edge and allows for higher feed rates, though it requires a more rigid machine setup.
Q: Is this insert compatible with dry machining?
A: While it can handle dry cuts due to its CVD coating, we recommend using coolant for stainless steel to maximize tool life and finish quality.
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.