Mitsubishi MMT16ER190W-S VP15TF Threading Insert | MMC Japan
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MMT16ER190W-S VP15TF
Mitsubishi Materials | External Whitworth (BSW/BSF/G) | 19 TPI
The Mitsubishi MMT16ER190W-S VP15TF is a precision-ground external threading insert designed for 19 TPI Whitworth (55°) thread profiles. Commonly used for small-diameter BSW/BSF fasteners and G 1/4" pipe threads, this insert is a staple for high-reliability CNC threading. Engineered with the -S type 3D chipbreaker, it provides superior chip control in external operations. Powered by the VP15TF Miracle PVD coating, it is the industry standard for threading stainless steel, carbon steel, and alloyed metals.
Technical Specifications
| ISO/Metric Designation | MMT16ER190W-S |
|---|---|
| Thread Profile | Whitworth 55° (Full Form) |
| Threads Per Inch (TPI) | 19 TPI |
| Insert Size (IC) | 9.525 mm (3/8") |
| Grade / Coating | VP15TF (Miracle Al-Ti-N PVD) |
VP15TF Miracle Grade
The VP15TF grade is Mitsubishi's benchmark for indexable threading. It utilizes a micro-grain carbide substrate paired with the Miracle (Al-Ti-N) coating. This combination offers high toughness and resistance to built-up edge (BUE), which is vital when machining gummy materials like 304 or 316 stainless steel at 19 TPI pitches.
-S Type 3D Chipbreaker
External threading on fine pitches like 19 TPI can lead to chip recutting. The -S molded chipbreaker uses a 3D geometry to curl chips into small, manageable spirals. This reduces heat friction, extending tool life and ensuring a flawless thread surface finish on every part.
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 - 140 m/min | 10 - 16 |
| Alloy Steel (SCM440) | 90 - 160 m/min | 9 - 15 |
EXTERNAL TOOLING SYSTEM
This 16ER insert is fully compatible with Mitsubishi MMTE external holders and standard 16mm (3/8" IC) threading tools.
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 | 1.337 mm | 19 TPI (Whitworth) |
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.