Mitsubishi MMT16ER160UN-S VP15TF External Threading Insert
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MMT16ER160UN-S VP15TF
Mitsubishi Materials | External Unified National (UN/UNC/UNF) | 16 TPI
The Mitsubishi MMT16ER160UN-S VP15TF is a high-precision external threading insert specifically engineered for 16 TPI (Threads Per Inch) Unified National thread profiles. This 60° full-form insert is the industry standard for CNC threading of high-tensile bolts, fasteners, and precision mechanical shafts. By integrating the advanced -S type 3D molded chipbreaker, it effectively eliminates long, tangled chips that often plague external threading cycles. Coated with the legendary VP15TF Miracle PVD coating, it offers unmatched performance when threading stainless steel, carbon steels, and heat-resistant alloys.
Technical Specifications
| ISO/Metric Designation | MMT16ER160UN-S |
|---|---|
| Thread Profile | UN/UNC/UNF (Unified National) 60° Full Form |
| Threads Per Inch (TPI) | 16 TPI |
| Insert Size (IC) | 9.525 mm (3/8") |
| Grade / Coating | VP15TF (Miracle Al-Ti-N PVD) |
VP15TF Miracle Grade
The VP15TF grade represents the pinnacle of Mitsubishi’s indexable threading technology. It utilizes a micro-grain carbide substrate paired with a high-aluminum Miracle (Al-Ti-N) coating. This provides incredible resistance to built-up edge (BUE) and heat deformation, making it exceptionally reliable for threading gummy materials like 304 and 316 stainless steel.
-S Type 3D Chipbreaker
External threading on fine 16 TPI pitches can produce stringy chips that damage the thread surface finish. The -S molded chipbreaker features a specialized 3D rake face that curls chips into tight spirals, significantly reducing cutting force and heat. This results in longer tool life and a mirror-like thread flank finish.
Recommended Cutting Parameters
| Workpiece Material | Cutting Speed ($v_c$) | Recommended No. of Passes |
|---|---|---|
| Carbon Steel (S45C) | 100 - 180 m/min | 9 - 14 |
| Stainless Steel (SUS304) | 80 - 140 m/min | 11 - 16 |
| Alloy Steel (SCM440) | 90 - 160 m/min | 10 - 15 |
MMTE EXTERNAL TOOLING SYSTEM
This 16ER insert is optimized for Mitsubishi MMTE external holders and standard 16mm (3/8" IC) threading tool shanks.
Shop MMTE Holders →Metric vs. Inch Cross-Reference
| Feature | Metric Designation | Inch Designation (ANSI) |
|---|---|---|
| Insert Size | 16 ER | 16ER (3/8" Inscribed Circle) |
| Thread Pitch | 1.588 mm | 16 TPI (Unified National) |