Korloy SEHT1204AFSN-X45 NCM325 Steel & Stainless Milling Insert (10pcs)
Price shown is a starting point. Contact us for a precise quote based on your requirements.
The Original Korloy SEHT1204AFSN-X45 NCM325 is a versatile and robust Square Face Milling Insert, designed for high-efficiency machining of Steel (P-Group) and Stainless Steel (M-Group). Utilizing the advanced NCM325 CVD Coating, this insert features a balanced combination of wear resistance and toughness, making it suitable for both continuous and interrupted milling operations. The -X45 geometry is specifically strengthened to handle the entry and exit impacts typical of 45-degree face milling, ensuring stable performance across a variety of workpiece materials.
The Universal Workhorse: NCM325 is Korloy's versatile grade that bridges the gap between high-speed finishing and medium-load roughing. If you are looking for a "one-grade-fits-all" solution for your 45° face mills, the SEHT1204-X45 NCM325 is the most reliable candidate in your shop.
Technical Specifications:
| Brand | Korloy (100% Genuine) |
| ISO Code | SEHT1204AFSN-X45 |
| Insert Shape | Square (Positive Rake) |
| Thickness / Relief Angle | 4.76 mm / 20° |
| Grade | NCM325 (CVD for Steel & Stainless) |
Core Performance Benefits:
- Optimized CVD Coating: Provides a thermal barrier that resists heat deformation, essential for high-speed dry milling of steel.
- Impact-Resistant Geometry: The X45 edge preparation is honed to prevent premature chipping when milling through scale or interrupted surfaces.
- Reduced Cutting Forces: The positive rake angle allows for smoother cutting, putting less strain on the machine spindle.
- Versatile Application: Excels in face milling, shoulder milling (with 45° cutters), and chamfering operations.
Recommended Cutting Parameters:
| Material | Cutting Speed (Vc) | Feed per Tooth (fz) | Max Depth (ap) |
|---|---|---|---|
| Carbon Steel (S45C) | 150 - 250 m/min | 0.10 - 0.25 mm/t | Max 5.0 mm |
| Alloy Steel (4140) | 120 - 200 m/min | 0.10 - 0.20 mm/t | Max 4.0 mm |
| Stainless Steel (304) | 100 - 180 m/min | 0.08 - 0.18 mm/t | Max 3.5 mm |
Compatible Face Milling Cutters:
Precision matched for 45-degree ISO standard face mills:
- Shell Mill Cutters: FMA11-SE12 Series (Most Popular)
- Chamfering Tools: 45-Degree SE12 Chamfering Cutters
Machinist Tip: NCM325 vs. PC5300
Choosing the right milling grade for SEHT1204 inserts:
CVD Productivity. Best for dry cutting steel at higher speeds. The CVD coating provides better thermal protection, meaning it won't wear down as fast in high-heat face milling.
Toughness & Sharpness. Better for small machines or very sticky stainless steel where a sharper edge is required. It is tougher against vibration but has lower heat resistance than NCM325.
Pro Advice: When using SEHT1204AFSN-X45 NCM325 on stainless steel, use an "Air Blast" instead of liquid coolant if possible. This prevents thermal cracking of the CVD coating and extends the tool life significantly.
Packaging: 10 pieces per box.
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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.