Mitsubishi MMT11IR125ISO-S VP15TF Threading Insert | MMC Japan
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MMT11IR125ISO-S VP15TF
Mitsubishi Materials | MMT Series Internal ISO Metric Threading
The Mitsubishi MMT11IR125ISO-S VP15TF is a precision internal threading insert engineered for 1.25mm pitch ISO metric threads. Designed for the MMTIR boring bar series, this insert features the advanced -S type 3D chipbreaker, which is essential for managing chip evacuation in restricted internal bores. Coated with the high-performance VP15TF Miracle PVD coating, it provides an exceptional balance of toughness and wear resistance, making it the preferred choice for threading steel, stainless steel, and heat-resistant alloys.
Technical Specifications
| ISO/Metric Designation | MMT11IR125ISO-S |
|---|---|
| Thread Standard / Angle | ISO Metric 60° (Full Form) |
| Thread Pitch | 1.25 mm |
| Insert Size (IC) | 6.35 mm (1/4") |
| Grade / Coating | VP15TF (Miracle PVD Coated) |
VP15TF "Miracle" Grade
The VP15TF grade is Mitsubishi’s premier universal PVD grade. It combines a tough micro-grain carbide substrate with the Miracle Al-Ti-N coating. This grade excels in indexable threading applications by resisting thermal shock and providing superior chipping resistance on the cutting edge, even during interrupted cuts.
-S Type 3D Chipbreaker
The -S type chipbreaker is specifically designed for internal threading where chip clogging is a risk. Its 3D molded geometry forces the chip to curl and break into short, manageable segments. This prevents the "bird-nesting" of chips around the tool or the threading bar, significantly improving surface finish and safety.
Recommended Cutting Parameters
| Workpiece Material | Cutting Speed ($v_c$) | No. of Passes (P=1.25) |
|---|---|---|
| Carbon Steel (S45C) | 80 - 160 m/min | 7 - 11 |
| Alloy Steel (SCM440) | 70 - 140 m/min | 8 - 12 |
| Stainless Steel (304/316) | 60 - 120 m/min | 9 - 14 |
MMTIR INTERNAL HOLDER SYSTEM
This 11IR insert is compatible with Mitsubishi MMTIR holders and standard threading boring bars with a 1/4" pocket.
Shop MMTIR Boring Bars →Metric vs. Inch Cross-Reference
| Feature | Metric: MMT11IR125ISO | ANSI: 11IR 1.25 ISO |
|---|---|---|
| Insert Length | 11 mm | 1/4" IC (Inscribed Circle) |
| Thread Pitch | 1.25 mm | ~20.3 TPI |
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.