ZCC.CT CNMG120404-04 EM YBG302 Carbide Turning Inserts for Stainless Steel
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ZCC.CT CNMG120404-EM YBG302: Specialized Stainless Steel Machining
Product Overview
The ZCC.CT CNMG120404-EM YBG302 is a versatile powerhouse engineered for the M-group (Stainless Steel) and S-group (Superalloys). The YBG302 grade features an advanced PVD coating (TiAlN) over a tough, fine-grained substrate, offering an excellent balance of wear resistance and impact toughness. The EM chipbreaker is specifically designed for medium turning operations, providing a sharp cutting edge that minimizes work hardening while maintaining enough strength to handle slight interruptions and varying depths of cut.
Key Features
- Advanced YBG302 PVD Coating: Optimized for thermo-chemical stability and resistance to notched wear.
- EM Medium-Duty Geometry: Features a sharp edge and wide chip-breaking range to prevent chip entanglement.
- Double-Sided Design: 8 usable cutting edges (4 per side) maximize cost-efficiency for industrial production.
- High Toughness: Excellent performance in interrupted cuts and machining with scale or skin.
Technical Specifications
ISO Designation Decoding
80° Rhombic
0° Relief
Tolerance
With Hole
12.9mm Edge
4.76mm Thick
0.4mm Rad
Medium Chip
| Standard | Model Designation | I.C. (Size) |
|---|---|---|
| Metric (ISO) | CNMG120404-EM | 12.7 mm |
| Imperial (ANSI) | CNMG 431-EM | 1/2" |
Recommended Parameters for YBG302
| Workpiece Material | Speed (Vc) m/min | Feed Rate (fn) mm/r |
|---|---|---|
| Stainless Steel (M) | 100 - 220 | 0.10 - 0.40 |
| High-Temp Alloys (S) | 30 - 80 | 0.08 - 0.30 |
Directly Compatible Tool Holders:
Applications & Compatibility
Engineered for high-efficiency turning in high-demand industrial sectors:
ZCC.CT Grade Comparison (Stainless Steel)
| Grade | Condition | Primary Advantage |
|---|---|---|
| YBM253 | Continuous / High Speed | CVD Coated - Wear Resistance |
| YBG302 | Unstable / Interrupted | PVD Coated - Impact Toughness |
Customer Feedback
"Reliable on Inconel"
"Used these for a small run of Inconel 718. The YBG302 held up much better than our previous brand against notched wear. Highly recommend for difficult materials."
— Mark T., USA
"Excellent Chip Control"
"The EM chipbreaker is the best we've used for 316 stainless. No more stringy chips wrapping around the spindle."
— Dieter H., Germany
"Great for manual lathes too"
"Stable performance in Italy shop. Even on older lathes where rigidity isn't perfect, these don't chip easily."
— Giovanni F., Italy
Frequently Asked Questions
Q: Is the YBG302 grade better than CVD grades for stainless steel?
A: PVD grades like YBG302 are generally superior for interrupted cuts and unstable conditions due to higher toughness and a thinner, sharper edge compared to CVD.
Q: What is the optimal depth of cut for the EM chipbreaker?
A: The EM geometry is optimized for medium machining, typically performing best at depths of cut (ap) between 1.0mm and 4.0mm.
Q: Can these be used for steel machining?
A: While optimized for stainless (M), YBG302 is a "universal" grade that performs well in carbon and alloy steels, especially in smaller shops needing versatility.
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.