Tungaloy TNMG160412-TM T9115 Turning Insert
Premium CVD Grade | TM Medium-Cutting Geometry | 1.2mm Reinforced Corner Radius
What is the most durable carbide insert for high-feed steel turning?
The Tungaloy TNMG160412-TM T9115 is a heavy-duty, double-sided triangular carbide insert engineered for high-velocity steel machining. Featuring a robust 1.2mm corner radius, this model provides maximum edge strength and stability under high feed rates. It utilizes the industry-leading T9115 CVD coating, which incorporates a thick alumina layer for extreme heat resistance and a specialized TiCN layer to prevent crater wear. The -TM chipbreaker is the professional standard for medium-duty cutting, ensuring excellent chip control even in difficult carbon and alloy steels. 100% Made in Japan.
T9115 High-Speed Grade
Optimized for P15 steel applications. Its superior thermal barrier allows for significantly higher surface speeds (Vc) without compromising tool life.
TM Heavy-Medium Geometry
Designed to handle larger depths of cut and higher feed rates. The geometry effectively curls and breaks chips to prevent machine downtime.
1.2mm Edge Strength
The large 1.2mm radius is perfect for roughing and semi-finishing where edge reliability is prioritized over fine finishing on small diameters.
Decoding TNMG 160412-TM Nomenclature
T
Tri
N
0°
M
Tol.
G
Hole
16
Size
04
Thk
12
1.2 Rad
-TM
Chip
3. Technical Parameters: Metric (ISO) vs. Imperial (ANSI)
| Feature |
Metric (ISO) |
Imperial (ANSI) |
| Standard Model |
TNMG160412-TM |
TNMG 333-TM |
| Inscribed Circle (IC) |
9.525 mm |
3/8" |
| Thickness (S) |
4.76 mm |
3/16" |
| Corner Radius (RE) |
1.2 mm |
3/64" |
Industrial Cutting Recommendations
-
Cutting Speed (Vc): 150 - 380 m/min (Highly efficient at high RPM)
-
Feed Rate (f): 0.20 - 0.50 mm/rev (Robust 1.2mm radius support)
-
Depth of Cut (ap): 1.0 - 5.0 mm
*Optimization: For large-diameter steel shafts, maximize the cutting speed to benefit from the T9115 thermal barrier coating.*
4. Primary Applications
- Continuous turning of large-diameter carbon steel parts.
- Semi-roughing of alloy steel components (4140, SCM440).
- High-feed operations requiring maximum corner strength.
- Automotive and heavy machinery shaft production.
5. Tool Compatibility
Standard ISO TNMG 1604 interface. Pairs with MTJNR/L, WTJNR/L, or DTGNR/L tool holders. Engineered for high-rigidity CNC lathes from Mazak, Haas, Okuma, and Doosan.
7. Why Source from CNCHome-Beyond?
100% Genuine
Tungaloy Japan Stock
B2B Technical Support
Machining Expertise
Express Logistics
Global Air Shipping
Quality Verified
Factory Sealed Boxes
Professional Workshop Feedback
⭐⭐⭐⭐⭐ "Heavy Cutting Beast" - James K., USA
"The 1.2mm radius is a lifesaver for our roughing passes on 4140 steel. T9115 is so much faster than our previous grade."
⭐⭐⭐⭐⭐ "Original & Sealed" - Markus D., Germany
"Authentic Tungaloy Japan inserts. Beyond always delivers fast. The tool life is remarkably consistent across 500 parts."
⭐⭐⭐⭐ "Great Chip Control" - Hiroshi S., Japan
"Using these for high-volume automotive shafts. The -TM geometry breaks chips perfectly at high feed rates."
⭐⭐⭐⭐⭐ "Solid Partner" - Carlos M., Mexico
"Fast shipping and technical help was spot on. Our Mazak machines run smoothly with these T9115 inserts."
⭐⭐⭐⭐⭐ "Extreme Stability" - Alistair M., UK
"The large corner radius handles light interruptions better than any other 16-size insert we've tried. Best for steel roughing."
8. FAQ - Machine Shop Support
Q: Why choose a 1.2mm corner radius over 0.8mm?
A: A 1.2mm radius is significantly stronger and can handle higher feed rates. It is also more resistant to heat and chipping during heavy roughing of large components.
Q: Is T9115 suitable for interrupted cutting?
A: T9115 is a high-speed grade best for continuous cutting. For heavy interrupted cuts, the T9125 grade may offer slightly better toughness against impact.
Q: Will this insert fit my MTJNR tool holder?
A: Yes, it is a standard ISO 16-size insert. It fits all MTJNR/L 16 pockets, providing a secure and stable seat for high-productivity turning.
Tech Tip: CVD Coating Thermal Protection
The **T9115 CVD grade** uses a specialized alumina barrier to reflect heat back into the chip. For maximum efficiency, ensure your **Vc** is high enough to reach the coating's optimal performance temperature. **Tungaloy Japan** - Leading Innovation in Steel Turning.
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