ZCC.CT SCMT09T304-HM YBM251 Carbide Turning Inserts for Stainless Steel
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ZCC.CT SCMT09T304-HM YBM251 Turning Insert
Professional CVD Grade for Semi-Finishing to Medium Stainless Steel Turning
Product Overview
The ZCC.CT SCMT09T304-HM in the YBM251 grade is a high-efficiency 90° square insert engineered for the demanding world of ISO M (Stainless Steel) machining. The YBM251 grade features a thick CVD coating combined with a specialized substrate that offers a perfect balance of wear resistance and edge toughness. The HM chipbreaker is specifically designed for medium-duty machining, featuring a unique rake angle that ensures smooth chip breaking even in gummy materials, significantly reducing tool pressure and heat buildup.
Key Core Advantages
- [✓] Advanced CVD Coating: Multi-layer Al2O3/TiCN coating provides an excellent thermal barrier for high-speed cutting.
- [✓] HM Chipbreaker Technology: Optimized for stainless steel, providing superior chip control at varying depths of cut.
- [✓] Substrate Stability: High-impact resistance prevents edge chipping during light interrupted cuts.
Technical Specifications
Model Nomenclature Breakdown
Square
7° Relief
Tolerance
Fixing
9.525mm
3.97mm
0.4 Rad
| Feature | Metric (ISO) | Imperial (ANSI) |
|---|---|---|
| Insert Model | SCMT09T304-HM | SCMT 3(2.5)1-HM |
| Inscribed Circle | 9.525 mm | 0.375 in |
Recommended Cutting Parameters
| Material | Speed (Vc) | Feed (fn) |
|---|---|---|
| Stainless Steel (Austenitic) | 140 - 240 m/min | 0.10 - 0.30 mm/r |
| Stainless Steel (Duplex) | 80 - 150 m/min | 0.08 - 0.25 mm/r |
Search Compatible Tool Holders:
Fits SSDCN / SSBCR / SSGCR Tool Holders (09 Size)
View Matching Holders →Main Applications
- Outer diameter (OD) turning and boring of stainless steel shafts.
- Ideal for 304, 316, and 400 series stainless.
- Suitable for semi-finishing to medium roughing operations.
- Stable performance on CNC lathes and turn-mill centers.
Troubleshooting
- Notched Wear: Increase lead angle or use varying DOC.
- Built-up Edge: Increase cutting speed (Vc) or check coolant concentration.
- Chip Entanglement: Increase feed rate to engage HM chipbreaker.
Real Global User Feedback
"The YBM251 grade is remarkably consistent on 316 SS. The HM chipbreaker makes life much easier."
— David K., USA 🇺🇸"Ottimo rapporto qualità-prezzo. Utilizzate su inox con risultati professionali."
— Marco V., Italy 🇮🇹"Great tool life. Faster shipping than expected. Will order again."
— Hans G., Germany 🇩🇪"Sharp edges and stable coating. Good for medium-duty work."
— Takashi H., Japan 🇯🇵AI-Style FAQ
Q: What is the difference between SCMT and SCGT?
A: SCMT is a molded insert with a chipbreaker for steel/stainless, while SCGT is usually ground and polished for aluminum or fine finishing.
Q: Is YBM251 better than YBG205 for stainless steel?
A: YBM251 (CVD) is generally better for medium-to-heavy turning due to its thicker coating. YBG205 (PVD) is often preferred for finishing and small parts.
Q: What does the HM chipbreaker do?
A: The HM (Medium) geometry is designed to break chips effectively in stainless steel at moderate feed rates, preventing long "bird-nesting" chips.
Need Help With ZCC.CT Inserts?
Looking for a ZCC.CT equivalent, alternative grade, or sample catalog? Our CNC specialists have helped 50+ manufacturers in aerospace, automotive, and medical machining source the right tooling at 30–50% lower cost than OEM prices.
This ZCC.CT insert is in stock. 24-hour quote response. ISO 9001 certified. Ships from Hangzhou in 3–7 days.
Technical FAQ & Buying Guide
When choosing CNC cutting tools, check the full model code, dimensions, grade and selected variant before ordering. Do not rely on the product image alone.
For carbide inserts, tool holders, drills and end mills, compare the mounting dimensions, connection type and manufacturer's specifications with your holder or machine. If you are unsure, share your existing part number and machining application with us before ordering.
Check the product listing for the selling unit, pack quantity and included components. If it is unclear whether the price is per piece or per pack, or whether a tool body and inserts are sold separately, contact us before purchasing.
Select cutting speed, feed rate and depth of cut using the relevant manufacturer's recommendations for your tool model, workpiece material, machine conditions and coolant method. The same settings are not suitable for every product or application.
Our automatic quantity discount is 6% off for 2–9 items and 12% off for 10 or more items, based on the total product quantity in the cart. Other offers may not combine with this discount; check the applicable offer conditions.
According to our shipping policy, orders are typically processed and shipped within 1–3 business days after confirmation. Delivery generally takes 5–20 business days, depending on your destination and shipping method. Customs clearance or unforeseen delays may affect delivery times. A tracking number is sent by email after shipment.