Mitsubishi MMT16IR140BSPT-S VP15TF Internal Threading Insert
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MMT16IR140BSPT-S VP15TF
Mitsubishi Materials | Internal BSPT (Whitworth) Pipe Threading | 14 TPI
The Mitsubishi MMT16IR140BSPT-S VP15TF is a premium internal threading insert engineered for 14 TPI British Standard Pipe Taper (BSPT) profiles. Featuring a 55° Whitworth thread form, this insert is the industry standard for creating leak-proof internal pipe connections. Designed for high-performance CNC threading, it incorporates the advanced -S type 3D chipbreaker to solve the common issue of chip nesting inside the bore. Coated with VP15TF Miracle PVD, it is the most versatile solution for threading stainless steel, carbon steels, and tough alloy materials.
Technical Specifications
| ISO/Metric Designation | MMT16IR140BSPT-S |
|---|---|
| Thread Standard | BSPT (Internal Tapered Pipe) |
| 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 is Mitsubishi's premier universal PVD grade. By combining a micro-grain carbide substrate with the Miracle (Al-Ti-N) coating, this indexable threading insert achieves a perfect balance of toughness and wear resistance. It effectively prevents built-up edge (BUE), which is vital for maintaining the strict tolerances of tapered pipe threads in gummy materials like 304/316 stainless steel.
-S Type 3D Chipbreaker
The -S molded chipbreaker is a game-changer for internal operations. In internal threading, chips often get trapped, causing surface scratches or tool failure. The 3D geometry of the -S breaker forces the chip to curl tightly and break, ensuring it can be easily flushed out by high-pressure coolant from the boring bar.
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 |
MMTIR INTERNAL SYSTEM
This 16IR insert is optimized for Mitsubishi MMTIR internal boring bars and standard 16mm internal threading holders.
Shop MMTIR Internal Bars →Metric vs. Inch Cross-Reference
| Feature | Metric Designation | Inch Designation (ANSI) |
|---|---|---|
| Insert Size | 16 IR | 16IR (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.