Mitsubishi MMT16ERA55-S VP15TF Threading Insert | MMC Japan
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MMT16ERA55-S VP15TF
Mitsubishi Materials | External Partial Profile 55° (Whitworth/BSP)
The Mitsubishi MMT16ERA55-S VP15TF is a versatile external threading insert featuring a partial profile 55-degree geometry. Unlike full-form inserts, this "A55" type can produce a range of pitches (0.5mm to 1.5mm / 48 to 16 TPI) while maintaining the 55° Whitworth angle. For CNC threading, this provides maximum flexibility for BSW, BSF, and G-series pipe threads. Engineered with the -S type 3D chipbreaker and the legendary VP15TF Miracle coating, it is the industrial standard for threading stainless steel and tough alloy steels.
Technical Specifications
| ISO/Metric Designation | MMT16ERA55-S |
|---|---|
| Thread Profile | 55° Partial Profile (Whitworth/BSP) |
| Pitch Range | 0.5 - 1.5 mm / 48 - 16 TPI |
| Insert Size (IC) | 9.525 mm (3/8") |
| Grade / Coating | VP15TF (Miracle Al-Ti-N PVD) |
VP15TF Miracle Grade
The VP15TF grade is Mitsubishi's benchmark for indexable threading. It utilizes a micro-grain carbide substrate paired with the Miracle (Al-Ti-N) coating. This combination offers high toughness and resistance to built-up edge (BUE), which is critical when machining gummy materials like 304 or 316 stainless steel where surface integrity is paramount.
-S Type 3D Chipbreaker
External threading often creates stringy, dangerous chips. The -S molded chipbreaker uses a 3D geometry to curl chips into small spirals. This reduces friction and heat, extending tool life and ensuring a flawless thread surface finish even on high-speed production lines.
Recommended Cutting Parameters
| Workpiece Material | Cutting Speed ($v_c$) | Recommended No. of Passes |
|---|---|---|
| Carbon Steel (S45C) | 100 - 180 m/min | 6 - 12 |
| Stainless Steel (SUS304) | 80 - 140 m/min | 8 - 14 |
| Alloy Steel (SCM440) | 90 - 160 m/min | 7 - 13 |
EXTERNAL TOOLING SYSTEM
This 16ERA55 insert is fully compatible with Mitsubishi MMTE external holders and standard 16mm (3/8" IC) threading tools.
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 | 1.5 mm | 16 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.