Tungaloy CNMG190612-THS T9125 Turning Insert
Maximum Impact Resistance | Premium CVD T9125 | Made in Japan
What is the best insert for extreme interrupted roughing in steel?
The Tungaloy CNMG190612-THS T9125 is a massive, extra-durable heavy-duty CVD coated carbide turning insert engineered for high-impact material removal. The T9125 grade is Tungaloy’s premier solution for steel (P-class) machining, featuring a specialized multi-layered coating that acts as a thermal shield under high-friction conditions. This indexable turning tool is equipped with the -THS chipbreaker, which is a specialized evolution of the TH geometry designed with a reinforced land to handle severe interrupted cuts, heavy scale, and non-uniform surfaces. For CNC machining of large-scale forgings or heavy alloy steel shafts, this Japan-made precision machining tool ensures maximized tool life and process security. By choosing this long-tail keywords optimized solution, you gain the mechanical strength required for deep roughing passes in unstable environments.
Decoding the CNMG190612-THS Technical Nomenclature
C
80° Rhombic
N
0° Clearance
M
M Tolerance
G
Hole & Clamps
19
19.05mm Edge
06
6.35mm Thick
12
1.2mm Radius
-THS
Stable Rough
Technical Specs: Metric vs. Imperial Comparison
| Standard Detail |
Metric Designation |
Imperial Designation |
| ISO / ANSI Model |
CNMG190612-THS |
CNMG643-THS |
| Inscribed Circle (IC) |
19.05 mm |
3/4 inch |
| Thickness (S) |
6.35 mm |
1/4 inch |
Why is the -THS breaker superior for stability?
The T9125 CVD Grade is renowned for its resistance to plastic deformation. When combined with the -THS chipbreaker, it becomes a powerhouse for heavy engineering. The "S" in THS stands for enhanced Stability—featuring an optimized land angle that prevents micro-chipping even when the tool encounters interrupted surfaces at high speeds. In precision machining, the 1.2mm corner radius provides immense structural strength, allowing for high feed rates (f) and significant depths of cut (ap). This indexable turning tool is the first choice for CNC machining on heavy-duty lathes where stopping for a broken insert is not an option.
Recommended Cutting Parameters for T9125
-
Cutting Speed (Vc): 110 - 260 m/min (Material dependent)
-
Feed Rate (f): 0.35 - 0.75 mm/rev
-
Depth of Cut (ap): 2.5 - 8.0 mm
*Pro Tip: For massive workpieces, use the 1906 thickness to ensure maximum heat dissipation and prevent vibration.*
Feedback from Heavy Industrial Shops
⭐⭐⭐⭐⭐ "Extreme Stability" - James D., USA
"Using the 1906-THS on heavy forgings. The interrupted cuts don't even phase it. T9125 grade is incredibly reliable."
⭐⭐⭐⭐⭐ "Best for Large Shafts" - Klaus B., Germany
"We turned several 4140 shafts with heavy interruptions. Tool life was much better than our previous supplier. Japan-made quality."
⭐⭐⭐⭐ "Great Metal Removal" - Marco S., Italy
"The -THS breaker pulls a thick chip and breaks it well. Very secure for overnight runs on large lathes."
⭐⭐⭐⭐⭐ "Standard Roughing Choice" - Hiroshi T., Japan
"Tungaloy excellence. For interrupted steel, the THS is my first recommendation to our shop floor."
⭐⭐⭐⭐⭐ "Fast Delivery & Original" - Tan M., Singapore
"Genuine Tungaloy inserts. The 19mm size is perfect for heavy roughing. Performance is exactly per catalog."
Technical Tooling Q&A
Q: What is the difference between -TH and -THS?
A: The -THS is an evolution designed specifically for "S" (Stability). It features an even more robust land to survive extreme interruptions where the standard TH might chip.
Q: Can I run this dry?
A: T9125 is a CVD grade with high thermal stability, so dry cutting is possible. However, coolant is recommended to help with chip evacuation during heavy roughing.
Q: Why choose the 1906 size over the 1606?
A: The 1906 has a larger inscribed circle (19.05mm), allowing it to handle much higher cutting forces and larger depths of cut in heavy-duty machinery.
Expert Insight: CVD Coating for Heavy Impact
For heavy material removal on large parts, CVD Coated Carbide (T9125) is the industry benchmark. The -THS geometry turns a fragile edge into a structural powerhouse, ensuring your tool life stays high even when the cut is unstable.
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