ZCC.CT CCMT120404-HM YBM251 Carbide Turning Inserts for Stainless Steel
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ZCC.CT CCMT120404-HM YBM251: Precision Turning Inserts for Stainless Steel
Product Overview
"Which insert is most reliable for semi-finishing 304 and 316 stainless steel with precise chip breaking and high surface quality?"
The ZCC.CT CCMT120404-HM YBM251 is a high-performance turning insert specifically engineered for the M-group (Stainless Steel) and S-group (Heat-resistant alloys). The YBM251 grade utilizes an advanced PVD coating combined with a fine-grained carbide substrate, offering exceptional resistance to thermal shock and notch wear. Integrated with the HM (Medium) chipbreaker, it provides superior chip control and reduced cutting forces, making it ideal for precision semi-finishing where process stability is paramount.
Key Features
- Advanced YBM251 PVD Grade: High coating toughness and adhesion prevent built-up edge (BUE) in gummy materials.
- HM Versatile Geometry: Optimized for medium cutting depths, balancing edge sharpness with impact resistance.
- 0.4mm Precision Radius: Perfect for semi-finishing applications requiring low radial cutting forces and high dimensional accuracy.
- Excellent Heat Resistance: Maintains edge integrity during the high thermal loads typical of stainless steel turning.
Technical Specifications
ISO Model Breakdown (CCMT 120404-HM)
80° Diamond
7° Relief
Tolerance
Hole/Chipbreak
12.9mm Edge
4.76mm Thick
0.4mm Radius
Medium Cut
| Metric Model | ANSI/Imperial Equivalent |
|---|---|
| CCMT120404-HM | CCMT 431-HM |
Recommended Cutting Data
| Workpiece Material | Cutting Speed (Vc) | Feed rate (fn) |
|---|---|---|
| Stainless Steel (M) | 150 - 240 m/min | 0.08 - 0.30 mm/rev |
| Superalloys (S) | 30 - 80 m/min | 0.05 - 0.20 mm/rev |
Tool Compatibility
Optimized for External and Internal Tooling:
Perfectly matches standard S-Type screw-down tool holders.
Applications
This insert is the industrial choice for Semi-Finishing of stainless steel parts in:
ZCC.CT Grade Guide (Stainless Machining)
| Grade | Cutting Condition | Primary Feature |
|---|---|---|
| YBM151 | Stable / High Speed | Maximum Wear Resistance |
| YBM251 | General Purpose / Universal | Balanced Toughness & Hardness |
Why Professionals Choose Us?
"Best for 316 Stainless"
"Switched from a major European brand to YBM251. The tool life is just as good, but at a much better value for our shop."
— James W., USA
"Superior Finish"
"The 0.4 radius combined with the HM chipbreaker gives a mirror finish on our medical components. Very stable."
— Lukas B., Germany
"Reliable and Productive"
"Chips break predictably even in deep holes. Durable PVD coating handles high temperatures well."
— Satoshi N., Japan
"Consistent Quality"
"Process stability is key for us. The CCMT 120404-HM provides predictable tool wear every time."
— Gianni M., Italy
Frequently Asked Questions
Q: Can YBM251 be used for steel turning?
A: While optimized for Stainless Steel (M), it can perform well in Steel (P) applications. For dedicated steel machining, the YBC series is recommended.
Q: Is flood coolant required for these inserts?
A: High-pressure flood coolant is strongly recommended for stainless steel to control heat and ensure efficient chip evacuation.
Q: What tool holder should I use with CCMT 120404?
A: It is compatible with any holder designated for CCMT 1204 inserts, such as SCLCR or SCLCL series tool holders.
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.