Mitsubishi MMT16IR300ISO-S VP15TF Threading Insert | MMC Japan
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MMT16IR300ISO-S VP15TF
Mitsubishi Materials | Heavy-Duty Internal ISO Metric | 3.0mm Pitch
The Mitsubishi MMT16IR300ISO-S VP15TF is a high-performance internal threading insert engineered for large-scale 3.0mm pitch ISO metric threads (standard for M24 and larger fasteners). Designed for high-torque internal CNC threading, this insert features the specialized -S type 3D chipbreaker. This geometry is essential for managing the massive chip volume generated by a 3.0mm pitch within the confines of a bore, ensuring safe evacuation and preventing tool breakage. Coated with VP15TF Miracle PVD, it provides maximum durability for threading alloy steel, stainless steel, and tough cast irons.
Engineering Specifications
| ISO Designation | MMT16IR300ISO-S |
|---|---|
| ANSI Style Model | 16IR 3.0 ISO-S (3/8" IC) |
| Thread Profile | ISO Metric 60° (Full Form) |
| Thread Pitch | 3.0 mm |
| Grade / Coating | VP15TF (Miracle Al-Ti-N PVD) |
VP15TF Miracle Grade
The VP15TF grade utilizes a tough micro-grain carbide substrate paired with Mitsubishi’s proprietary Miracle (Al-Ti-N) PVD coating. It is designed for indexable threading applications requiring high fracture toughness. This universal grade excels at medium-to-low cutting speeds and effectively prevents built-up edge (BUE) in gummy materials like SUS304 stainless steel.
-S Type 3D Chipbreaker
The -S molded chipbreaker is an industry leader in internal chip control. Large 3.0 pitch threads create thick chips that can easily "bird-nest" inside the workpiece. The 3D geometry forces these 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) | 80 - 150 m/min | 14 - 22 |
| Stainless Steel (304/316) | 60 - 120 m/min | 16 - 26 |
| Alloy Steel (SCM440) | 70 - 140 m/min | 15 - 24 |
INTERNAL TOOLING COMPATIBILITY
The 16IR profile is optimized for Mitsubishi MMTIR internal boring bars. For a 3.0mm pitch, ensure your bar has adequate clearance.
Shop MMTIR Internal Bars →Metric vs. Inch Cross-Reference
| Feature | Metric (ISO Model) | Inch Equivalent (ANSI) |
|---|---|---|
| Insert Size | 16 IR | 3 IR (3/8" Inscribed Circle) |
| Thread Pitch | 3.0 mm | ~8.47 TPI (Threads Per Inch) |
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.