Tungaloy CNMG120404-TM T9115 Turning Insert
High-Speed Steel Machining | Premium CVD T9115 | Made in Japan
What is the most wear-resistant insert for high-speed steel turning?
The Tungaloy CNMG120404-TM T9115 is a high-productivity CVD coated carbide turning insert specifically engineered for the high-speed machining of steel (P-class). The T9115 grade is optimized for continuous cutting, featuring a thick Al2O3 layer that provides industry-leading heat resistance and wear protection. This indexable turning tool utilizes the versatile -TM chipbreaker, designed for medium cutting applications to ensure stable chip control and reduced cutting forces. Whether you are focused on CNC machining of carbon steel or alloy steels, this Japan-made precision machining tool delivers superior surface finishes and maximized tool life. By choosing this long-tail keywords optimized insert, you benefit from Tungaloy’s "PremiumTec" surface technology, which minimizes adhesion and optimizes chip evacuation during intensive production cycles.
Decoding the CNMG120404-TM Technical Nomenclature
C
80° Rhombic
N
0° Clearance
M
M Tolerance
G
Hole & Clamps
12
12.9mm Edge
04
4.76mm Thick
04
0.4mm Radius
-TM
Medium Cut
Technical Specs: Metric vs. Imperial Comparison
| ISO / ANSI Standard |
Metric Designation |
Imperial Designation |
| Product Model |
CNMG120404-TM |
CNMG431-TM |
| Inscribed Circle (IC) |
12.7 mm |
1/2 inch |
| Corner Radius (RE) |
0.4 mm |
1/64 inch |
Is T9115 grade better than T9125 for steel turning?
The T9115 CVD Grade is specifically tuned for high-speed, continuous cutting where thermal stability is paramount. Unlike T9125, which is balanced for general purpose and interrupted cuts, the T9115 grade excels in pure productivity. For CNC machining professionals, the -TM chipbreaker provides a highly versatile geometry that works across a broad range of depths and feeds. This indexable turning tool is a powerhouse in precision machining, ensuring that even under high friction, the cutting edge remains stable. The CNMG120404-TM is the ultimate choice when you need to push your cycle times to the limit while maintaining a high-quality surface finish and predictable tool life.
Recommended Cutting Parameters for T9115
Optimized for P (Steel):
-
Cutting Speed (Vc): 180 - 450 m/min (Standard steel)
-
Feed Rate (f): 0.15 - 0.40 mm/rev
-
Depth of Cut (ap): 0.5 - 4.0 mm
*Pro Tip: Ensure stable clamping and high-pressure coolant to fully utilize the high-speed potential of the T9115 grade.*
Feedback from Global Machinists
⭐⭐⭐⭐⭐ "Incredible speed" - Robert H., Germany
"I run these at 350 m/min on carbon steel and they don't even sweat. Tungaloy T9115 is the king of productivity."
⭐⭐⭐⭐⭐ "Reliable and Fast" - Steve B., USA
"We use the CNMG120404-TM for all our semi-finishing. The chip control is consistent and the tool life is predictable for our long production runs."
⭐⭐⭐⭐ "Great Surface Finish" - Matteo G., Italy
"Very smooth cutting action. The -TM geometry handles heat very well and leaves a mirror finish on our alloy steel shafts."
⭐⭐⭐⭐⭐ "Premium Japan Tool" - Hiroshi N., Japan
"Very stable performance in automated lines. T9115 grade resists crater wear better than any other grade we have tested."
⭐⭐⭐⭐⭐ "Original & High Quality" - Tan W., Singapore
"Received original Tungaloy stock. Best pricing for high-end CVD precision tooling. My CNC lathe performs at its best with these."
Technical Tooling Q&A
Q: Is T9115 suitable for interrupted cuts?
A: T9115 is primarily designed for high-speed continuous cutting. For heavy interrupted cuts, the tougher T9125 grade is usually recommended.
Q: Can I use this for stainless steel?
A: T9115 is a specialist for P (Steel). For M-class materials like stainless steel, the AH series or specialized stainless grades from Tungaloy should be used.
Q: What makes the -TM breaker versatile?
A: It is a general-purpose medium cutting geometry. It balances chip control at both high and low feed rates, making it suitable for a wide variety of workpieces.
Expert Tip: High-Speed Productivity
For high-efficiency steel turning, CVD Coated Carbide (T9115) is the benchmark for speed. Its thick coating acts as a thermal shield, allowing you to increase surface speeds without sacrificing tool life, making it the premier choice for modern CNC machining centers.
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