PVD Coated Double-Sided Carbide Insert for Heavy-Duty Steel Milling CNC Milling Tool
The GESAC SNMU120612GM GA4230 is a high-performance double-sided square indexable carbide milling insert from GESAC (Xiamen Golden Egret Special Alloy Co., Ltd.) – a leading Chinese manufacturer of premium tungsten carbide cutting tools. Designed for heavy roughing to semi-finishing of steels, stainless steels, cast irons, and high-hardness materials (up to HRC 55), it features a GM chipbreaker and robust GA4230 PVD coating for exceptional impact resistance, chip control, and long tool life in demanding CNC milling applications.
- Model: SNMU120612GM GA4230
- Brand: GESAC (Xiamen Golden Egret, China)
- Geometry: SNMU = Square, double-sided, 4 usable edges, negative rake angle
- Dimensions: 12 = IC 12.7 mm; 06 = thickness 6.35 mm; 12 = corner radius 1.2 mm
- Chipbreaker: GM – optimized for heavy cutting, large chip space, efficient evacuation
- Grade: GA4230 – high-strength ultrafine carbide substrate with PVD coating
- Coating: Advanced PVD coating, excellent heat, wear, and adhesion resistance
- Edges: 4 usable cutting edges (double-sided design), high rigidity for interrupted cuts
- Carbon steels (P20–P40) – primary
- Stainless steels (M20–M30, 304/316/420)
- Alloy steels (4140, 42CrMo4, HRC < 55)
- Grey & ductile cast irons (K10–K30)
- Hardened steels (HRC 50–55)
- Heavy face milling & shoulder milling
- High-feed milling & roughing (large depth of cut)
- Slotting, ramping, and profiling (interrupted cuts)
- General-purpose CNC milling (mass production & heavy job shops)
- Dry machining (excellent thermal stability)
| Item | Parameter |
|---|---|
| Model | GESAC SNMU120612GM GA4230 |
| Product Type | Indexable Carbide Milling Insert |
| Shape | Square (Double-sided, 90° cutting edge) |
| Relief Angle | Negative (high rigidity) |
| Inscribed Circle (IC) | 12.7 mm (0.5 in) |
| Thickness (S) | 6.35 mm (0.25 in) |
| Corner Radius (Re) | 1.2 mm (0.047 in) |
| Chipbreaker | GM (Heavy-Duty Milling) |
| Grade | GA4230 (PVD Coated Ultrafine Carbide) |
| Coating | PVD (Heat & Wear Resistant) |
| Usable Edges | 4 (Double-sided) |
| Compatible Holders | 45°/75° shell mill cutters (NAC series) |
| Country of Origin | China (Xiamen) |
| Packaging | 10 pieces per box |
Combines a heavy-duty GM chipbreaker with GESAC’s durable GA4230 PVD grade. Delivers superior impact resistance, reliable chip control, and extended tool life in heavy roughing and high-hardness material milling. Ideal for shops seeking cost-effective, high-performance inserts for demanding CNC applications.
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