Mitsubishi MMT16ER120UN-S VP15TF External Threading Insert
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MMT16ER120UN-S VP15TF
Mitsubishi Materials | External Unified National (UN/UNC/UNF) | 12 TPI
The Mitsubishi MMT16ER120UN-S VP15TF is a high-precision external threading insert specifically designed for 12 TPI (Threads Per Inch) Unified National thread profiles. This full-form 60° insert ensures absolute accuracy for CNC threading of bolts, studs, and shafts. Featuring the advanced -S type 3D molded chipbreaker, it solves the problem of long, stringy chips in external operations. Coated with the premium VP15TF Miracle PVD coating, this insert excels in threading stainless steel, carbon steels, and tough alloyed materials.
Technical Specifications
| ISO/Metric Designation | MMT16ER120UN-S |
|---|---|
| Thread Standard | UN, UNC, UNF, UNEF (Unified National) |
| Threads Per Inch (TPI) | 12 TPI |
| Thread Angle | 60° Full Form |
| Grade / Coating | VP15TF (Miracle Al-Ti-N PVD) |
VP15TF Miracle Grade
The VP15TF grade is Mitsubishi's premium universal PVD solution. It combines a high-toughness carbide substrate with the proprietary Miracle (Al-Ti-N) coating. This provides the indexable threading insert with extreme heat resistance and prevents built-up edge (BUE), which is critical when machining gummy materials like 304 or 316 stainless steel.
-S Type 3D Chipbreaker
External threading on 12 TPI profiles can generate significant heat and friction. The -S molded chipbreaker utilizes 3D geometry to curl chips into tight spirals, significantly reducing cutting resistance. This leads to a superior thread surface finish and extended tool life by preventing chip welding on the flank.
Recommended Cutting Parameters
| Workpiece Material | Cutting Speed ($v_c$) | Recommended No. of Passes |
|---|---|---|
| Carbon Steel (S45C) | 100 - 180 m/min | 10 - 16 |
| Stainless Steel (SUS304) | 80 - 140 m/min | 12 - 18 |
| Alloy Steel (SCM440) | 90 - 160 m/min | 11 - 17 |
MMTE EXTERNAL TOOLING SYSTEM
This 16ER insert is designed for use with 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 | 2.117 mm | 12 TPI (Unified National) |
Technical FAQ & Buying Guide
Absolutely. Our CNC carbide inserts (including CNMG, WNMG, DNMG, and APMT series) are manufactured strictly adhering to international ISO/ANSI specifications. A CNMG 120408 from OYYU BEYOND will flawlessly fit any standard turning tool holder or indexable tool from major global brands like Sandvik Coromant, Kennametal, Iscar, Walter, or SECO, providing a highly cost-effective premium alternative without sacrificing tolerance or tool life.
We offer optimized CVD and PVD multi-layer coatings for different ISO material groups:
- For Carbon/Alloy Steel (ISO P): Choose our thick multi-layer CVD coated grades (e.g., Al2O3 + TiN). They provide exceptional crater wear resistance and thermal barriers during high-speed dry or wet roughing.
- For Stainless Steel (ISO M): Choose our nano-structured PVD coated grades with sharp, positive chipbreakers (like -TM or -MA). This combination prevents work hardening and effectively controls sticky chips.
The optimal cutting parameters vary depending on the workpiece hardness and operation type:
- For General Steel Turnings: Recommended cutting speed ($V_c$) ranges from 150 to 280 m/min, with a feed rate ($f$) of 0.15 to 0.45 mm/rev.
- For Stainless Steel Finishing: Recommended cutting speed ($V_c$) is 120 to 200 m/min, with a feed rate ($f$) of 0.10 to 0.25 mm/rev.Always adjust parameters based on early wear patterns: increase $V_c$ if built-up edge occurs, or reduce $V_c$ if severe flank wear is observed.
Yes, we support machine shops, distributors, and global buyers with tiered wholesale pricing and competitive volume discounts. We also provide OEM custom manufacturing solutions for tool holders and carbide inserts based on your technical drawings. Contact our team to request a quick B2B quotation.
We provide secure worldwide express shipping (via DHL, FedEx, and UPS) with specialized, vibration-proof industrial packaging to ensure tools arrive in perfect condition. In-stock items are dispatched within 24-48 hours, while custom or bulk orders typically have a stable lead time of 15-25 days.
All our cutting tools and tool holders are manufactured strictly in accordance with ISO 9001 and international industrial standards. Every batch undergoes 100% rigorous quality control testing using high-precision optical measuring equipment to ensure reliable tool life and stable performance in continuous mass production.