Tungaloy SNMG120404R-S T9125 Turning Insert
Precision Right-Hand Steel Finishing | T9125 CVD Grade | Stable -S Chipbreaker
Which insert is best for finishing steel with a right-hand tool holder?
The Tungaloy SNMG120404R-S T9125 is a premium, double-sided square turning insert specifically engineered for high-precision finishing of ISO P (Steel) materials. This specific Right-Hand (R) model features the T9125 CVD coated grade, designed to withstand high temperatures while maintaining a sharp cutting edge. The -S chipbreaker is specialized for light depths of cut, providing exceptional chip control and preventing surface marring. Authentic Made in Japan, this tool is the professional choice for mass production where surface integrity and dimensional consistency are non-negotiable.
T9125 CVD Advantage
Features a thick Al2O3 layer that provides a powerful thermal barrier. This allows for increased cutting speeds without compromising the carbide substrate's integrity.
-S Chip Control
The -S geometry is fine-tuned for light-duty finishing passes. It forces chips to curl and break even at low feeds, protecting the workpiece from "chip nesting."
PremiumTec Post-Treatment
Tungaloy’s signature surface smoothing technology reduces cutting forces and adhesion, ensuring a superior surface finish and longer tool life.
Decoding SNMG120404R-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.
R-S
Right Hand/S
3. Technical Specifications: Metric vs. Imperial
| Parameter |
Metric (ISO) |
Imperial Equivalent |
| Inscribed Circle (IC) |
12.7 mm |
1/2" (SNMG 431R) |
| Thickness (S) |
4.76 mm |
3/16" |
| Corner Radius (RE) |
0.4 mm |
1/64" |
| Application Range |
ISO P (Steel Finishing) |
Steel/Alloy Specialist |
Recommended Cutting Parameters (T9125 Grade)
-
Cutting Speed (Vc): 180 - 320 m/min (Standard Steel)
-
Feed Rate (f): 0.08 - 0.25 mm/rev
-
Depth of Cut (ap): 0.3 - 1.5 mm
*Note: Ensure your tool holder is Right-Handed to match the 'R' designation of this insert. For best finish, keep Vc high and ap within the recommended range.*
4. Product Applications
- High-precision turning of small diameter steel shafts.
- Final surface finishing for automotive and aerospace components.
- Continuous light-duty turning in medium-to-hard alloy steels.
- B2B industrial production requiring high dimensional accuracy.
5. Tool Compatibility
Universal fit for standard ISO Right-Hand Turning Holders (e.g., PSSNR, DSBNR, PSKNR). Designed for SNMG 1204 pockets. Ensure toolholder orientation matches the Right-Hand (R) insert geometry.
7. Why Choose CNCHome-Beyond?
Genuine Japan
100% Original Tungaloy
Expert B2B Team
Technical Support Experts
Global Logistics
Fast & Reliable Delivery
Bulk Inventory
Large Quantity Stock
Global Professional Reviews
⭐⭐⭐⭐⭐ "Perfect for Finish Passes" - D. Miller, USA
"Using these for finishing 1045 steel shafts. The right-hand orientation fits my holders perfectly and the -S breaker keeps the chips short."
⭐⭐⭐⭐⭐ "Authentic Tungaloy" - M. Schmidt, Germany
"Original Japanese packaging. The T9125 grade is my workhorse for precision parts. Predictable wear every time."
⭐⭐⭐⭐ "Very Reliable" - K. Tanaka, Japan
"Consistent accuracy for my CNC production line. Tungaloy quality is exactly as expected."
⭐⭐⭐⭐⭐ "Great Service" - R. Ivanova, Bulgaria
"Fast international shipping to Europe. The products are genuine and the technical support from the seller was excellent."
⭐⭐⭐⭐⭐ "Zero Built-up Edge" - S. Tan, Singapore
"Even at 300 m/min, the edge stays clean. The surface finish is very smooth, saving us time on secondary operations."
8. FAQ - Professional Support
Q: Can I use this R-hand insert in a left-hand holder?
A: No. For optimal chip flow and clearance, ensure your tool holder orientation matches the Right-Hand (R) designation of the insert.
Q: Is T9125 better than cermet for finishing?
A: T9125 is tougher. While cermet offers higher gloss, T9125 is much more reliable if your finish pass has slight interruptions or varied depths of cut.
Q: Does this fit SNMG 431 holders?
A: Yes, SNMG 120404 is the metric size equivalent to the Imperial SNMG 431.
Expert Machinist Tip: Finishing Steel with T9125
The T9125 CVD grade is engineered for a "balanced" performance—providing extreme heat resistance while maintaining the edge toughness required for finishing carbon steel. Paired with the -S chipbreaker, it excels at managing the tricky long chips typically found in light finishing. For maximum productivity, ensure rigid setup and consistent coolant flow. Trust Tungaloy Japan for world-class CNC efficiency.
© Technical Data by cnchome-beyond.com - CNC Industrial Authority
