Mitsubishi MMT16ER300ISO-S VP15TF Threading Insert | MMC Japan
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MMT16ER300ISO-S VP15TF
Mitsubishi Materials | MMT Series External ISO Metric 3.0mm Pitch
The Mitsubishi MMT16ER300ISO-S VP15TF is a heavy-duty external threading insert designed for large-scale 3.0mm pitch ISO metric threads (e.g., M24, M27 standard bolts). Engineered for high-torque CNC threading, this insert features the specialized -S type 3D molded chipbreaker. This geometry is essential for managing the extreme chip volume produced at a 3.0mm pitch, preventing chip entanglement and protecting the workpiece surface. Coated with VP15TF Miracle PVD, it provides maximum edge strength for threading alloy steel, stainless steel, and cast iron.
Technical Specifications
| ISO/Metric Designation | MMT16ER300ISO-S |
|---|---|
| ANSI Equivalent (Inch) | 16ER 3.0 ISO-S (3/8" IC) |
| Thread Profile / Angle | ISO Metric 60° (Full Form) |
| Thread Pitch | 3.0 mm |
| Grade / Coating | VP15TF (Miracle Al-Ti-N PVD) |
VP15TF Miracle Grade
The VP15TF grade is Mitsubishi's premium universal PVD solution. By combining a tough carbide substrate with a Miracle (Al-Ti-N) coating, it offers excellent heat resistance and anti-welding properties. When indexable threading tough materials, VP15TF prevents premature flank wear and edge chipping, making it highly reliable for large-pitch operations.
-S Type (3D) Chipbreaker
Large 3.0 pitch threads generate massive chips. The -S molded chipbreaker uses a 3D rake face to force these chips into a tight curl. This reduces the contact area between the chip and the tool, lowering cutting temperatures and vibration. It is the gold standard for maintaining thread accuracy in heavy machining.
Recommended Cutting Parameters
| Workpiece Material | Cutting Speed ($v_c$) | Recommended No. of Passes |
|---|---|---|
| Carbon Steel (S45C) | 80 - 160 m/min | 14 - 22 |
| Stainless Steel (SUS304/316) | 60 - 120 m/min | 16 - 26 |
| Cast Iron (HT250) | 70 - 140 m/min | 12 - 20 |
MMTE EXTERNAL TOOLING SYSTEM
Optimized for use with Mitsubishi MMTE external holders. Ensure the use of a proper shim for high-pitch threads.
Shop MMTE Holders →Metric vs. Inch Cross-Reference
| Feature | Metric (ISO Model) | Inch Equivalent (ANSI) |
|---|---|---|
| Insert Size | 16 ER | 3 ER (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.