Mitsubishi MMT16ER140BSPT-S VP15TF Threading Insert | MMC Japan
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MMT16ER140BSPT-S VP15TF
Mitsubishi Materials | MMT Series External BSPT (Whitworth) | 14 TPI
The Mitsubishi MMT16ER140BSPT-S VP15TF is a high-precision external threading insert designed for 14 TPI British Standard Pipe Taper (BSPT) profiles. This 55° Whitworth-based tapered thread is essential for pressure-tight sealing in pipe fittings. Engineered with the specialized -S type 3D molded chipbreaker, it delivers superior chip control during CNC threading, preventing the stringy nests commonly associated with pipe threads. Utilizing the VP15TF Miracle PVD coating, this insert offers extreme versatility for threading stainless steel, carbon steel, and alloyed materials.
Technical Specifications
| ISO/Metric Designation | MMT16ER140BSPT-S |
|---|---|
| Thread Standard | BSPT (British Standard Pipe Taper) |
| Threads Per Inch (TPI) | 14 TPI |
| Thread Angle | 55° Full Form |
| Grade / Coating | VP15TF (Miracle Al-Ti-N PVD) |
VP15TF Miracle Grade
The VP15TF grade combines a high-toughness carbide substrate with Mitsubishi's proprietary Miracle (Al-Ti-N) PVD coating. It is widely recognized as the best universal grade for indexable threading, providing unmatched heat resistance and preventing built-up edge (BUE) even when machining gummy materials like 316 stainless steel.
-S Type (3D) Chipbreaker
The -S molded chipbreaker utilizes 3D geometry to optimize chip formation. By reducing cutting forces and curling chips into manageable sizes, it maintains a perfect surface finish on the tapered thread flank. This is critical for ensuring a leak-proof seal in hydraulic and pneumatic connections.
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
The 16ER series is perfectly compatible with Mitsubishi MMTE external holders and standard 16mm threading bars.
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 | 1.814 mm | 14 TPI (BSPT) |
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.