Mitsubishi MMT16ER125ISO-S VP15TF Threading Insert | MMC Japan
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MMT16ER125ISO-S VP15TF
Mitsubishi Materials | MMT Series External ISO Metric Threading
The Mitsubishi MMT16ER125ISO-S VP15TF is a precision-engineered external threading insert designed for 1.25mm pitch ISO metric threads. As a core component of the MMT series, this insert features the advanced -S type 3D chipbreaker, specifically designed to control chip flow during the high-pressure threading process. Coated with the high-performance VP15TF Miracle PVD coating, this tool provides an exceptional balance of toughness and heat resistance, making it the premier choice for threading carbon steel, stainless steel, and alloyed materials.
Technical Specifications
| ISO/Metric Designation | MMT16ER125ISO-S |
|---|---|
| Thread Standard / Angle | ISO Metric 60° (Full Form) |
| Thread Pitch | 1.25 mm |
| Insert Size (IC) | 9.525 mm (3/8") |
| Grade / Coating | VP15TF (Miracle PVD Coated) |
VP15TF Miracle Grade
The VP15TF grade is Mitsubishi’s premier universal PVD grade. Utilizing the Al-Ti-N Miracle coating technology over a micro-grain substrate, it offers superior resistance to built-up edge (BUE) and plastic deformation. This grade is the industry standard for indexable threading where reliability across diverse materials is essential.
-S Type 3D Chipbreaker
The -S type geometry features a molded 3D rake surface that prevents long, stringy chips. In CNC threading, chip control is vital to prevent workpiece marring. This chipbreaker ensures that chips are curled and broken at the correct moment, protecting the threading tool holder and the finished part surface.
Recommended Cutting Parameters
| Workpiece Material | Cutting Speed ($v_c$) | No. of Passes (P=1.25) |
|---|---|---|
| Carbon Steels (S45C) | 100 - 180 m/min | 7 - 11 |
| Stainless Steels (304/316) | 80 - 140 m/min | 9 - 13 |
| Alloy Steels (SCM440) | 90 - 160 m/min | 8 - 12 |
MMTE EXTERNAL TOOLING
This 16ER insert is optimized for Mitsubishi MMTE external holders and standard 16mm (3/8" IC) threading tools.
Shop MMTE Holders →Metric vs. Inch Cross-Reference
| Feature | Metric Standard | ANSI Standard (Inch) |
|---|---|---|
| Insert Size (L) | 16 mm | 3/8" IC |
| Thread Pitch | 1.25 mm | ~20.3 TPI |