Mitsubishi MMT16IRAG60-S VP15TF Internal Threading Insert
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MMT16IRAG60-S VP15TF
Mitsubishi Materials | Internal Partial Profile 60° AG (Metric / UN / UNC / UNF)
The Mitsubishi MMT16IRAG60-S VP15TF is an exceptionally versatile internal threading insert featuring a partial profile 60-degree AG geometry. The "AG" designation signifies an expanded pitch range, allowing a single tool to machine internal threads from 0.5mm to 3.0mm (48 to 8 TPI). This versatility is essential for CNC threading of various Metric and Unified National (UN) coarse threads. Engineered with the -S type 3D molded chipbreaker and the proprietary VP15TF Miracle PVD coating, it is the industrial standard for threading stainless steel and tough alloys in deep-hole applications where chip evacuation is critical.
Technical Specifications
| ISO/Metric Designation | MMT16IRAG60-S |
|---|---|
| Thread Profile | 60° Partial Profile (AG Wide Range) |
| Metric Pitch Range | 0.5 - 3.0 mm |
| Inch Pitch Range | 48 - 8 TPI |
| Grade / Coating | VP15TF (Miracle Al-Ti-N PVD) |
VP15TF Miracle Grade
The VP15TF grade is the benchmark for indexable threading. It utilizes 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 results when threading gummy materials like 316 stainless steel.
-S Type (3D) Chipbreaker
Internal threading is notoriously difficult for chip evacuation. The -S molded chipbreaker features a specialized 3D rake geometry that curls chips into tight spirals. This allows chips to be easily flushed out of the bore by the internal boring bar's coolant, preventing surface damage and protecting the thread surface finish.
Recommended Cutting Parameters
| Workpiece Material | Cutting Speed ($v_c$) | Typical No. of Passes |
|---|---|---|
| Carbon Steel (S45C) | 90 - 160 m/min | 8 - 18 |
| Stainless Steel (304/316) | 70 - 130 m/min | 10 - 22 |
| Alloy Steel (SCM440) | 80 - 140 m/min | 9 - 20 |
MMTIR INTERNAL TOOLING SYSTEM
This 16IR AG60 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 | 0.5 - 3.0 mm | 48 - 8 TPI |
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This Mitsubishi insert is in stock. 24-hour quote response. ISO 9001 certified. Ships from Hangzhou in 3–7 days.
Technical FAQ & Buying Guide
When choosing CNC cutting tools, check the full model code, dimensions, grade and selected variant before ordering. Do not rely on the product image alone.
For carbide inserts, tool holders, drills and end mills, compare the mounting dimensions, connection type and manufacturer's specifications with your holder or machine. If you are unsure, share your existing part number and machining application with us before ordering.
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Select cutting speed, feed rate and depth of cut using the relevant manufacturer's recommendations for your tool model, workpiece material, machine conditions and coolant method. The same settings are not suitable for every product or application.
Our automatic quantity discount is 6% off for 2–9 items and 12% off for 10 or more items, based on the total product quantity in the cart. Other offers may not combine with this discount; check the applicable offer conditions.
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