ZCC.CT CNMG120408 YBM251 Carbide Turning Inserts for Stainless Steel
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ZCC.CT CNMG120408 YBM251: Premium Stainless Steel Turning Insert
Product Overview
The ZCC.CT CNMG120408 YBM251 is a world-class solution specifically engineered for M-group (Stainless Steel) applications. The YBM251 grade combines a high-toughness substrate with an advanced CVD coating, making it the go-to choice for medium-duty turning. Designed to handle the work-hardening nature of stainless steel, this insert ensures stable performance even in demanding conditions.
Key Features
- ✔ Advanced CVD Coating: Provides superior heat resistance and prevents built-up edge (BUE) on gummy materials.
- ✔ YBM251 Toughness: A balanced grade that offers exceptional resistance to thermal cracking and mechanical shock.
- ✔ Optimized Chipbreaker: Specifically designed for stainless steel to ensure smooth chip evacuation and reduced cutting force.
Technical Specifications
ISO Nomenclature Breakdown
Rhombic 80°
0° Relief
Tolerance
Hole/Slot
Edge 12.9mm
Thick 4.76
Radius 0.8
| Standard | Model Designation | Inscribed Circle (IC) |
|---|---|---|
| Metric (ISO) | CNMG120408 | 12.7 mm |
| Imperial (ANSI) | CNMG 432 | 1/2" |
Recommended Cutting Parameters
| Workpiece Material | Cutting Speed (Vc) m/min | Feed Rate (f) mm/rev |
|---|---|---|
| Stainless Steel (Austenitic) | 150 - 240 | 0.15 - 0.45 |
| Duplex Stainless Steel | 80 - 160 | 0.15 - 0.40 |
Compatible External Tool Holders:
Applications & Tool Compatibility
The CNMG120408 YBM251 excels in mass production environments, specifically for:
Compatible with any ISO standard turning center including Mazak, Haas, Okuma, and DMG Mori.
ZCC.CT Grade Comparison (Stainless Steel)
| Grade | Optimized For |
|---|---|
| YBM151 | High speed, stable conditions, finishing. |
| YBM251 | Versatile medium turning, balanced wear and toughness. |
| YBM351 | Heavy interruption, low speed, roughing. |
Why Choose ZCC.CT Tools?
As a leading manufacturer of high-quality carbide cutting tools, ZCC.CT provides the perfect balance of cost-efficiency and premium performance. Our YBM series is a staple in precision machine shops worldwide.
Outstanding performance on 304SS
"Switched to YBM251 for our valve production. Tool life increased by 25% compared to our previous German inserts. Highly recommended."
— Precision Works, USA
Affidabile e costante
"Ottimo inserto per acciaio inossidabile. Finitura superficiale eccellente e durata costante."
— Meccanica Ferrari, Italy
コストパフォーマンス最高
"ステンレス加工での安定性が抜群です。価格も手頃で、大量生産には欠かせません。"
— Sato Industries, Japan
Gute Standzeit
"Sehr gute Ergebnisse bei Duplex-Stahl. Die Standzeit ist beeindruckend stabil."
— GmbH CNC, Germany
FAQ - Frequently Asked Questions
Q1: Can YBM251 be used for dry cutting?
While it can handle high heat, we recommend coolant for stainless steel to prevent chip welding and ensure the best surface finish.
Q2: What is the difference between CNMG120404 and CNMG120408?
The 08 suffix indicates a 0.8mm nose radius, which provides a stronger edge and better finish at higher feed rates compared to the 0.4mm (04) radius.
Q3: Is YBM251 suitable for Duplex Stainless Steel?
Yes, it is highly effective for Duplex. Adjust cutting speeds slightly lower (80-160 m/min) for optimal tool life.
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.