Mitsubishi MMT16IRG60-S VP15TF Internal Threading Insert
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MMT16IRG60-S VP15TF
Mitsubishi Materials | Internal Partial Profile 60° G-Range (Metric / UN / UNC / UNF)
The Mitsubishi MMT16IRG60-S VP15TF is a heavy-duty internal threading insert engineered for coarse 60-degree profiles. The "G" designation indicates a specialized pitch range of 1.75mm to 3.0mm (14 to 8 TPI), making it the primary choice for CNC threading of large Metric and Unified National (UN) coarse threads. Built with the -S type 3D molded chipbreaker and the proprietary VP15TF Miracle PVD coating, this insert is the industrial standard for threading stainless steel and high-tensile alloys in deep-bore applications where chip evacuation is critical.
Technical Specifications
| ISO/Metric Designation | MMT16IRG60-S |
|---|---|
| Thread Profile | 60° Partial Profile (Internal G-Range) |
| Metric Pitch Range | 1.75 - 3.0 mm |
| Inch Pitch Range | 14 - 8 TPI |
| Grade / Coating | VP15TF (Miracle Al-Ti-N PVD) |
VP15TF Miracle Grade
The VP15TF grade is the benchmark for indexable threading reliability. It combines a high-toughness micro-grain carbide substrate paired with Mitsubishi’s Miracle (Al-Ti-N) PVD coating. This provides extreme resistance to built-up edge (BUE) and thermal cracking, ensuring consistent performance when threading gummy materials like 316 stainless steel or alloy steels.
-S Type (3D) Chipbreaker
Large pitch internal threading produces high chip volume. The -S molded chipbreaker utilizes 3D geometry to curl chips into tight spirals, allowing them to be flushed out easily by the internal boring bar's coolant flow. This prevents chip recutting and "nesting," protecting the thread surface finish and extending tool life.
Recommended Cutting Parameters
| Workpiece Material | Cutting Speed ($v_c$) | Typical No. of Passes |
|---|---|---|
| Carbon Steel (S45C) | 90 - 160 m/min | 12 - 20 |
| Stainless Steel (SUS304) | 70 - 130 m/min | 14 - 24 |
| Alloy Steel (SCM440) | 80 - 140 m/min | 13 - 22 |
MMTIR INTERNAL TOOLING SYSTEM
This 16IR G60 insert is optimized for use with Mitsubishi MMTIR internal boring bars and standard 16mm (3/8" IC) 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) |
| Pitch Range | 1.75 - 3.0 mm | 14 - 8 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.