Mitsubishi MMT16ERG55-S VP15TF Threading Insert | MMC Japan
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MMT16ERG55-S VP15TF
Mitsubishi Materials | External Partial Profile 55° G-Range (Whitworth / BSP)
The Mitsubishi MMT16ERG55-S VP15TF is a heavy-duty external threading insert featuring a partial profile 55-degree G geometry. The "G" designation is optimized for coarser pitches, covering a range from 1.75mm to 3.0mm (14 to 8 TPI). This insert is the professional solution for CNC threading of large-diameter Whitworth bolts, G-series pipe fittings, and hydraulic connectors. Featuring the specialized -S type 3D molded chipbreaker and the proprietary VP15TF Miracle PVD coating, it excels in threading stainless steel and high-tensile alloys where high heat and chip control are critical.
Technical Specifications
| ISO/Metric Designation | MMT16ERG55-S |
|---|---|
| Thread Profile | 55° Partial Profile (G-Range Coarse) |
| Pitch Range (Metric) | 1.75 - 3.0 mm |
| Pitch Range (Inch) | 14 - 8 TPI |
| Grade / Coating | VP15TF (Miracle Al-Ti-N PVD) |
VP15TF Miracle Grade
The VP15TF grade is Mitsubishi's ultimate PVD solution for indexable threading. By combining a high-toughness carbide substrate with the Miracle (Al-Ti-N) coating, this insert resists thermal cracking and built-up edge (BUE). It is particularly effective for machining stainless steel (SUS304/316) and alloy steels under heavy cutting loads.
-S Type 3D Chipbreaker
Coarser threads (8-14 TPI) generate substantial chip volume. The -S molded chipbreaker uses a 3D geometry to curl chips away from the workpiece. This prevents "chip wrapping" and ensures a superior thread surface finish, protecting the cutting edge from premature wear during high-feed CNC threading cycles.
Recommended Cutting Parameters
| Workpiece Material | Cutting Speed ($v_c$) | Number of Passes |
|---|---|---|
| Carbon Steel (S45C) | 100 - 180 m/min | 12 - 20 |
| Stainless Steel (304/316) | 80 - 140 m/min | 14 - 24 |
| Alloy Steel (SCM440) | 90 - 160 m/min | 13 - 22 |
ENGINEERED TOOLING SYSTEM
The 16ERG55 insert is fully compatible with Mitsubishi MMTE external holders and standard 16mm (3/8" IC) threading tool shanks.
Shop MMTE Holders →Metric vs. Inch Cross-Reference
| Feature | Metric Designation | Inch Designation (ANSI) |
|---|---|---|
| Insert Size | 16 ER | 16ER (3/8" Inscribed Circle) |
| Max 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.