Tungaloy TNMG160404-TM T9125 Turning Insert
Toughened CVD Grade | TM Medium-Cutting Geometry | Industrial Excellence for Steel
Which carbide insert is best for interrupted steel turning?
The Tungaloy TNMG160404-TM T9125 is a high-toughness, double-sided triangular carbide insert optimized for versatile steel (P-group) machining. Utilizing Tungaloy’s advanced T9125 CVD coating technology, this insert is specifically engineered to handle the thermal and mechanical shocks of interrupted cuts and unstable setups. The -TM chipbreaker is a master of chip control, providing a smooth evacuation process across various feed rates. 100% Made in Japan, it is the industrial choice for CNC workshops requiring extreme reliability and long tool life in carbon and alloy steels.
T9125 Toughened Grade
Designed for balance. It provides superior resistance to chipping compared to the T9115, making it the premier choice for general steel turning and light interruptions.
TM Chipbreaker Geometry
The "Universal" medium-cutting geometry. It balances sharp cutting action with edge strength, preventing vibration and ensuring high surface integrity.
Double-Sided 6-Edge
Economic efficiency meets high performance. The triangular TNMG design offers 6 cutting edges per insert, significantly lowering your cost-per-part.
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 Data: Metric (ISO) vs. Imperial (ANSI)
| Feature |
Metric (ISO) |
Imperial (ANSI) |
| Standard Model |
TNMG160404-TM |
TNMG 331-TM |
| Inscribed Circle (IC) |
9.525 mm |
3/8" |
| Thickness (S) |
4.76 mm |
3/16" |
| Corner Radius (RE) |
0.4 mm |
1/64" |
Industrial Cutting Recommendations
-
Cutting Speed (Vc): 100 - 300 m/min (Recommended 220 m/min)
-
Feed Rate (f): 0.15 - 0.35 mm/rev
-
Depth of Cut (ap): 0.5 - 3.5 mm
*Pro-Tip: When machining steels with scale or in interrupted cuts, T9125 is the stable choice to prevent edge micro-chipping.*
4. Primary Applications
- General purpose turning of Carbon and Alloy Steels (SCM, S45C).
- Excellent for parts with interrupted surfaces or weld beads.
- Suitable for machining shafts, flanges, and heavy bolts.
- Reliable for medium-duty mass production in CNC lathes.
5. Tool Compatibility
Fits all standard ISO/ANSI TNMG 1604 tool holders. Recommended for use with MTJNR/L, WTJNR/L, or DTGNR/L tool holder series. Compatible with Haas, Mazak, and Doosan CNC systems.
7. Why Source from CNCHome-Beyond?
100% Genuine
Tungaloy Japan Stock
B2B Tech Support
Professional Expertise
Fast Shipping
Global Air Logistics
Quality Verified
Sealed Factory Boxes
B2B Customer Feedback
⭐⭐⭐⭐⭐ "Extreme Stability" - James K., USA
"T9125 is my go-to for general shop work. It handles the 'unknown' steels perfectly. Much tougher than the T9115 in interrupted cuts."
⭐⭐⭐⭐⭐ "Original Packaging" - Markus D., Germany
"Received in sealed Tungaloy boxes. Fast shipping to Germany. The inserts provide a fantastic surface finish on alloy steel."
⭐⭐⭐⭐ "Great for Interrupted Cuts" - Hiroshi S., Japan
"Consistent tool life even with light vibrations. The TM chipbreaker manages the chips well, preventing long tangles."
⭐⭐⭐⭐⭐ "Solid Partner" - Carlos M., Mexico
"Beyond's technical advice helped us optimize our feed rates. These Japan-made inserts are simply superior to local generic options."
⭐⭐⭐⭐⭐ "Excellent Tool Life" - Alistair M., UK
"We run these on our CNC lathe for batches of 500. The wear is very predictable. Highly recommend CNCHome-Beyond."
8. FAQ - Workshop Tech Support
Q: Can T9125 be used for stainless steel?
A: T9125 is primarily a steel grade (P). For stainless steel (M), we recommend Tungaloy AH725 or T6130 for better thermal management and to prevent built-up edge.
Q: What is the difference between T9115 and T9125?
A: T9115 is harder and better for high-speed continuous turning. T9125 is tougher and better for interrupted cutting or applications with vibration.
Q: Why does the TNMG design have 6 edges?
A: Because it is a double-sided triangular insert. Each side has 3 edges, giving you a total of 6 cutting corners to maximize your ROI.
Tech Tip: Toughened CVD Grade Application
The **T9125 CVD grade** is the reliable workhorse of the Tungaloy lineup. It is engineered to withstand impact and thermal cracking. For the best tool life, ensure your machine setup is rigid and use a consistent flow of coolant. **Tungaloy Japan** - Engineering the Future of Machining.
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