Mitsubishi MMT16IR150ISO-S VP15TF Threading Insert | MMC Japan
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MMT16IR150ISO-S VP15TF
Mitsubishi Materials | Internal ISO Metric Threading | 1.5mm Pitch
The Mitsubishi MMT16IR150ISO-S VP15TF is a high-performance internal threading insert engineered for 1.5mm pitch ISO metric threads. Designed for the high-rigidity MMTIR boring bar series, this insert features the advanced -S type 3D molded chipbreaker. This geometry is specialized for internal CNC threading where chip space is limited, ensuring chips are curled and broken to prevent damage to the internal bore. Coated with the legendary VP15TF Miracle PVD coating, it is the premier choice for threading stainless steel, alloy steels, and general carbon steels.
Technical Specifications
| ISO Designation | MMT16IR150ISO-S |
|---|---|
| Thread Profile / Angle | ISO Metric 60° (Full Form) |
| Thread Pitch | 1.5 mm |
| Insert Size (IC) | 9.525 mm (3/8") |
| Grade / Coating | VP15TF (Miracle Al-Ti-N PVD) |
VP15TF Miracle Grade
The VP15TF grade utilizes a micro-grain carbide substrate paired with Mitsubishi’s proprietary Miracle (Al-Ti-N) PVD coating. It provides exceptional fracture resistance and prevents built-up edge (BUE). This universal grade is the industry standard for indexable threading where versatility and high-speed stability are required across various workpieces.
-S Type (3D) Chipbreaker
The -S molded chipbreaker is specifically engineered for internal operations. In CNC threading, chips often "nest" inside the bore. The 3D rake angle forces the chip to curl tightly and break, allowing for smooth evacuation via high-pressure coolant from the boring bar, ensuring a perfect surface finish.
Recommended Cutting Parameters
| Workpiece Material | Cutting Speed ($v_c$) | Recommended No. of Passes |
|---|---|---|
| Carbon Steel (S45C) | 100 - 180 m/min | 8 - 14 |
| Stainless Steel (SUS304) | 80 - 150 m/min | 10 - 16 |
| Alloy Steel (SCM440) | 90 - 160 m/min | 9 - 15 |
MMTIR INTERNAL SYSTEM
This 16IR insert is designed for Mitsubishi MMTIR internal boring bars and standard 16mm threading tools.
Shop MMTIR Internal Bars →Metric vs. Inch Cross-Reference
| Feature | Metric (ISO Model) | Inch Equivalent (ANSI) |
|---|---|---|
| Insert Size | 16 IR | 3 IR (3/8" Inscribed Circle) |
| Thread Pitch | 1.5 mm | ~16.9 TPI (Threads Per Inch) |