Tungaloy TNMG160404-TM AH725 Turning Insert
High-Performance PVD Grade | TM Medium-Cutting Geometry | Made in Japan
Which insert is best for general purpose steel and stainless turning?
The Tungaloy TNMG160404-TM AH725 is a versatile, high-rigidity turning insert designed for the demands of modern CNC shops. Featuring the legendary AH725 PVD coated grade, this insert excels in both carbon steels and difficult-to-cut stainless steels. The -TM chipbreaker is the industrial standard for medium-duty cutting, providing a perfect balance between chip control and edge strength. Whether you are performing continuous turning or light interrupted cuts, the TNMG 160404-TM provides stable tool life and superior surface integrity. 100% Made in Japan by Tungaloy Corporation.
AH725 PVD Grade
A premium PVD coating with a tough carbide substrate. Highly resistant to chipping and thermal shock, making it ideal for various materials and machining conditions.
TM Medium Geometry
Specifically engineered for medium cutting depths. It provides excellent chip evacuation across a wide range of feed rates, reducing machine downtime.
Double-Sided Design
Features 6 usable cutting edges per triangular insert, significantly lowering your cost-per-edge in high-volume production environments.
Decoding TNMG 160404-TM nomenclature
T
Tri
N
0°
M
Tol.
G
Clamp
16
Size
04
Thk
04
0.4 Rad
-TM
Chip
3. Technical Specifications: Metric (ISO) vs. Imperial (ANSI)
| Feature |
Metric (ISO) |
Imperial (ANSI) |
| Standard Model |
TNMG160404-TM |
TNMG 331-TM |
| Cutting Edge (L) |
16.5 mm |
0.650" |
| Inscribed Circle (IC) |
9.525 mm |
3/8" |
| Thickness (S) |
4.76 mm |
3/16" |
Recommended Cutting Parameters
-
Cutting Speed (Vc): 100 - 250 m/min (Steel) | 70 - 180 m/min (Stainless)
-
Feed Rate (f): 0.15 - 0.40 mm/rev
-
Depth of Cut (ap): 1.0 - 4.0 mm
*Pro-Tip: When machining stainless steel, use high-pressure coolant to prolong the PVD coating life and prevent work-hardening.*
4. Primary Applications
- General purpose machining of carbon and alloy steels (P-group).
- Excellent for Austenitic stainless steels (M-group).
- Suitable for both CNC lathes and conventional turning machines.
- Ideal for machining shafts, bolts, and precision components.
5. Tool Compatibility
Fits all standard ISO/ANSI TNMG 1604 tool holders. Recommended for use with MTJNR/L, WTJNR/L, or DTGNR/L series tool holders. Compatible with major machine brands including Haas, Mazak, and DMG Mori.
7. Why Source from CNCHome-Beyond?
100% Original
Tungaloy Japan Supply
Expert Knowledge
B2B Industry Experts
Global Logistics
Fast International Air
Genuine Packaging
Factory Sealed Boxes
Customer Reviews from Professional Workshops
⭐⭐⭐⭐⭐ "Workhorse Grade" - James K., USA
"AH725 is a beast. We switch between 1045 steel and 304 stainless without changing the insert. The TM chipbreaker handles everything."
⭐⭐⭐⭐⭐ "Original Tungaloy" - Markus D., Germany
"Received in factory sealed boxes. The quality is noticeably better than generic alternatives. Best price/performance ratio."
⭐⭐⭐⭐ "Great for Interrupted Cuts" - Hiroshi S., Japan
"Consistent tool life even with light interruptions. The edge stays sharp for a long time. Very reliable supplier."
⭐⭐⭐⭐⭐ "B2B Support is Top" - Carlos M., Mexico
"Beyond helped us with the cutting parameters. The inserts work perfectly on our Mazak lathe. Will buy again."
⭐⭐⭐⭐⭐ "Superior Finish" - Alistair M., UK
"Excellent surface finish on our stainless components. AH725 really resists building up edge better than others."
8. FAQ - Machine Shop Technical Support
Q: Can I use AH725 for heavy roughing?
A: AH725 is a tough PVD grade, but the -TM geometry is optimized for medium cutting. For heavy roughing, we recommend the -TH or -TH chipbreakers with a larger corner radius.
Q: Is this insert compatible with all TNMG tool holders?
A: Yes, as long as the tool holder is designed for the 16 size (ISO) or 33 size (ANSI), the TNMG160404-TM will fit perfectly regardless of brand.
Q: What is the benefit of the TM chipbreaker?
A: The -TM (Medium) chipbreaker is designed for general purpose machining. It provides a wide application range for depths of cut and feed rates, making it very versatile for different jobs.
Tech Tip: PVD vs CVD Coatings
The **AH725 PVD grade** provides a sharper edge and higher toughness compared to CVD coatings. This makes it superior for stainless steel and machining small diameters where heat and edge integrity are critical. **Tungaloy Japan** - Excellence in Tooling Technology.
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