Tungaloy SNMG120404L-S T9125 Turning Insert
High-Stability Steel Finishing | T9125 CVD Grade | Specialized -S Chipbreaker
How do I solve chip control issues in light steel turning?
The Tungaloy SNMG120404L-S T9125 is a high-precision, double-sided square turning insert specifically designed for the finishing of ISO P (Steel) materials. This model features the T9125 CVD coated grade, renowned for its thermal stability and wear resistance, and the -S chipbreaker, which is optimized for small depths of cut. As a Made in Japan industrial tool, it ensures predictable tool life and superior surface integrity in high-speed CNC operations, particularly when dealing with long-chipping carbon steels.
T9125 CVD Technology
A premium CVD coated carbide grade that utilizes a thick Al2O3 layer to protect against crater wear, allowing for high cutting speeds (Vc) in steel machining.
-S Chipbreaker Geometry
The -S breaker is designed for light-duty finishing. It provides excellent chip breaking even at low depths of cut, preventing "bird-nesting" on your workpiece.
Premium Surface Post-Treatment
Tungaloy’s specialized post-treatment creates a smooth coating surface, reducing friction and preventing chip welding for a cleaner finish.
Decoding SNMG120404L-S Technical Nomenclature
S
Square
N
0° Relief
M
Tolerance
G
Hole/Fix
12
12.7mm Size
04
4.76mm Thick
04
0.4mm Rad.
L-S
Hand/Breaker
3. Technical Specifications: Metric vs. Imperial
| Parameter |
Metric (ISO) |
Imperial Equivalent |
| Insert Size |
12.7 mm |
1/2" (SNMG 431) |
| Thickness |
4.76 mm |
3/16" |
| Corner Radius |
0.4 mm |
1/64" |
| Grade |
T9125 (CVD) |
Steel Turning Specialist |
Recommended Cutting Parameters (T9125 Grade)
-
Cutting Speed (Vc): 180 - 350 m/min (Standard Steel)
-
Feed Rate (f): 0.08 - 0.25 mm/rev
-
Depth of Cut (ap): 0.3 - 1.5 mm
*Pro Tip: For optimal surface finish, maintain high cutting speeds. The T9125 grade is designed to handle high heat while maintaining a sharp edge.*
4. Product Applications
- Fine finishing of automotive components.
- Turning small diameter shafts requiring tight tolerances.
- Final passes on alloy steel parts to improve surface roughness.
- Mass production of precision hardware in B2B sectors.
5. Holder Compatibility
Standard fit for ISO Turning Holders (e.g., PSSNR/L, DSBNR/L). This insert fits any tool holder designed for SNMG 1204 pockets. Use the Left-hand (L) orientation for specific tool-path requirements.
7. Why Choose CNCHome-Beyond?
Genuine Japan
100% Original Tungaloy
B2B Expertise
CNC Technical Specialists
Fast Global
Reliable Express Shipping
OEM Verified
Trusted Factory Supplier
Global Machinist Reviews
⭐⭐⭐⭐⭐ "Excellent Finish" - James H., USA
"The -S breaker really helps with chip control on light cuts. My surface finish on alloy steel is much better now."
⭐⭐⭐⭐⭐ "Authentic Quality" - M. Berger, Germany
"Received original Tungaloy Japan packaging. T9125 is the best workhorse grade for our CNC turning."
⭐⭐⭐⭐ "Very Sharp" - T. Sato, Japan
"Stable performance for finishing. Consistent quality across every batch."
⭐⭐⭐⭐⭐ "Great Service" - F. Silva, Brazil
"Fast delivery to our workshop. The technical data provided was very helpful for our machine settings."
⭐⭐⭐⭐⭐ "No Chip Issues" - W. Chen, Singapore
"The chipbreaker geometry works exactly as described. No more long chips tangling around the tool."
8. FAQ - Technical Support
Q: Is T9125 better than PVD grades for steel?
A: For high-speed turning of general steel, CVD grades like T9125 are superior due to their thicker thermal barrier coating.
Q: What does the 'L' stand for in the model code?
A: It designates the Hand of Tool (Left), which is critical for choosing the correct tool holder and tool path.
Q: Does this fit SNMG 431 holders?
A: Yes, SNMG 120404 is the metric size equivalent to the Imperial SNMG 431.
Industrial Tip: The Strength of T9125
The T9125 grade is engineered for a "balanced" life—offering high resistance to both heat and mechanical wear. While cermet grades like NS9530 are for the ultimate gloss, T9125 is the reliable workhorse for precision finishing where tool reliability is paramount. Trust Tungaloy Japan for your mass production needs. Experience world-class efficiency at your spindle.
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