Mitsubishi MMT16IR110W-S VP15TF Internal Threading Insert
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MMT16IR110W-S VP15TF
Mitsubishi Materials | Internal Whitworth (BSW/BSF/G) | 11 TPI
The Mitsubishi MMT16IR110W-S VP15TF is a high-performance internal threading insert engineered for 11 TPI Whitworth (55°) thread profiles. Designed for internal CNC threading of BSW/BSF fasteners and G 1/2" to G 7/8" pipe fittings, this full-form insert ensures perfect thread crests and roots. It features the advanced -S type 3D chipbreaker, specifically designed to eliminate chip nesting in deep bores. Coated with VP15TF Miracle PVD, this insert provides the ultimate durability for threading stainless steel, alloy steel, and carbon steel.
Engineering Specifications
| ISO Designation | MMT16IR110W-S |
|---|---|
| ANSI Style Model | 16IR 11W-S (3/8" IC) |
| Thread Profile | Whitworth 55° Full Form |
| Threads Per Inch | 11 TPI |
| Grade / Coating | VP15TF (Miracle Al-Ti-N PVD) |
VP15TF Miracle Grade
The VP15TF grade is the industry's benchmark for indexable threading. It utilizes a micro-grain carbide substrate with a proprietary Miracle (Al-Ti-N) PVD coating. This grade offers extreme toughness and prevents built-up edge (BUE), making it ideal for the high-pressure environment of internal Whitworth threading in gummy materials like 316 stainless steel.
-S Type 3D Chipbreaker
The -S molded chipbreaker is specifically engineered for internal chip control. Fine Whitworth threads can often produce stringy chips that get trapped in the bore. The 3D geometry forces chips into a tight spiral, allowing them to be flushed out easily by the boring bar's coolant, ensuring a superior internal thread surface finish.
Recommended Cutting Parameters
| Workpiece Material | Cutting Speed ($v_c$) | Recommended No. of Passes |
|---|---|---|
| Carbon Steel (S45C) | 90 - 160 m/min | 12 - 18 |
| Stainless Steel (304/316) | 70 - 130 m/min | 14 - 22 |
| Alloy Steel (SCM440) | 80 - 140 m/min | 13 - 20 |
INTERNAL TOOLING COMPATIBILITY
This 16IR insert is optimized for Mitsubishi MMTIR internal boring bars. For 11 TPI, ensure high-pressure coolant is utilized.
Shop MMTIR Internal Bars →Metric vs. Inch Cross-Reference
| Feature | Metric (ISO Model) | Inch Equivalent (ANSI) |
|---|---|---|
| Insert Size | 16 IR | 16IR (3/8" Inscribed Circle) |
| Thread Pitch | 2.309 mm | 11 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.