Mitsubishi SPMN120308 VP15TF | PVD Coated Carbide Insert
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SPMN120308 VP15TF
Mitsubishi Materials | High-Performance Miracle Coated Carbide
The Mitsubishi SPMN120308 VP15TF is a premium PVD coated carbide insert engineered for versatile milling and turning applications. Featuring the legendary Miracle Coating (VP15TF), this insert excels in carbon steel, alloy steel, and stainless steel. Its 12mm square profile and flat-top design provide maximum edge strength for stable, high-reliability machining.
Nomenclature Breakdown
Square
11° Relief
M-Class Tol.
Flat Top
12.7mm Size
3.18mm Thick
0.8mm Rad.
Metric vs. Inch Specifications
| Dimension | ISO (Metric) | ANSI (Inch) Equivalent |
|---|---|---|
| Part Number | SPMN120308 | SPMN 422 |
| Inscribed Circle | 12.7 mm | 0.500" |
| Thickness | 3.18 mm | 0.125" |
| Corner Radius | 0.8 mm | 0.031" |
Material: VP15TF PVD Coating
VP15TF is Mitsubishi’s premium universal grade. It combines a tough micro-grain carbide substrate with a specialized PVD coating. This coating offers exceptional oxidation resistance and adhesion prevention, making it the top choice for milling stainless steel where built-up edge (BUE) often causes tool failure.
Geometry: Flat-Top (N-Type)
The N-type geometry indicates a flat-top face without a molded chipbreaker. This design maximizes the volume of carbide behind the cutting edge, providing superior impact resistance for interrupted cuts and high-feed roughing in manual or CNC machines.
Recommended Cutting Parameters
| Material | Cutting Speed ($v_c$) | Feed per Tooth ($f_z$) |
|---|---|---|
| Carbon Steel | 100 - 220 m/min | 0.10 - 0.25 mm/t |
| Stainless Steel | 80 - 160 m/min | 0.08 - 0.20 mm/t |
| Cast Iron | 100 - 180 m/min | 0.15 - 0.35 mm/t |