Korloy SEHT1204AFSN-X45 NCM325 Steel & Stainless Milling Insert (10pcs)
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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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