Tungaloy SNMG120408L-S T9125 Turning Insert
High-Stability Left-Hand Steel Machining | T9125 CVD Grade | Specialized -S Chipbreaker
How do I achieve better chip control in left-hand steel turning?
The Tungaloy SNMG120408L-S T9125 is a high-performance, double-sided square turning insert specifically designed for ISO P (Steel) applications. This Left-Hand (L) specific geometry, combined with the -S chipbreaker, is engineered to solve chip control issues during finishing and medium-duty turning. Utilizing Tungaloy’s premium T9125 CVD coated grade, this insert provides a perfect balance of edge toughness and high-speed wear resistance. Authentic Made in Japan, it is the industrial benchmark for CNC workshops requiring precision and long cycle times in alloy and carbon steels.
T9125 CVD Coating
Features a thick Al2O3 layer for exceptional heat resistance. This grade is optimized for steel, preventing crater wear even during high-speed continuous cutting.
-S Chipbreaker Geometry
Specifically tuned for finishing to medium cutting. It ensures stable chip breaking even at small depths of cut, preventing surface damage from long chips.
PremiumTec Surface
Tungaloy's proprietary post-treatment smoothens the coating surface to reduce friction and prevent built-up edge (BUE), leading to a superior finish.
Decoding SNMG120408L-S Technical Nomenclature
S
Square
N
0° Relief
M
Tolerance
G
Hole/Fix
12
12.7mm Size
04
4.76mm Thick
08
0.8mm Rad.
L-S
Left/Breaker
3. Technical Specifications: Metric vs. Imperial
| Parameter |
Metric (ISO) |
Imperial Equivalent |
| Inscribed Circle (IC) |
12.7 mm |
1/2" (SNMG 432L) |
| Thickness (S) |
4.76 mm |
3/16" |
| Corner Radius (RE) |
0.8 mm |
1/32" |
| Grade Specification |
T9125 (CVD) |
Universal Steel Grade |
Recommended Cutting Parameters (T9125 Grade)
-
Cutting Speed (Vc): 150 - 300 m/min (Ideally 220 m/min for standard alloy steel)
-
Feed Rate (f): 0.10 - 0.35 mm/rev
-
Depth of Cut (ap): 0.5 - 2.5 mm
*Note: Ensure your tool holder matches the Left-Hand (L) designation of this insert. For best surface finish, keep the feed rate toward the lower end of the range.*
4. Product Applications
- Precision turning of steel shafts and sleeves.
- Finishing passes on carbon and alloy steel components.
- High-volume automotive parts production.
- B2B industrial machining in high-torque lathe environments.
5. Tool Compatibility
Compatible with all standard ISO Left-Hand Turning Holders (External: DSBNL, PSSNL; Internal: S...-PSSNL). Designed specifically for SNMG 1204 pockets.
7. Why Choose CNCHome-Beyond?
Genuine Japan
100% Original Tungaloy
Expert B2B Support
CNC Technical Specialist Team
Global Logistics
Fast & Secure Delivery
Reliable Stock
Ready for Bulk Factory Orders
What Global Machinists Are Saying
⭐⭐⭐⭐⭐ "Perfect for Left-Hand Ops" - David K., USA
"Finding high-quality left-hand inserts can be tricky. These SNMG120408L-S inserts from Tungaloy fit my holder perfectly and provide a glass-like finish."
⭐⭐⭐⭐⭐ "Excellent Wear Resistance" - L. Wagner, Germany
"T9125 is my go-to grade for steel. We ran these for 8 hours straight with very little flank wear. Authentic Japanese quality."
⭐⭐⭐⭐ "Great Chip Control" - H. Sato, Japan
"The -S breaker works exactly as advertised for finishing. No more long bird-nest chips on our CNC lathes."
⭐⭐⭐⭐⭐ "Fast B2B Delivery" - A. Rossi, Italy
"Shipping to our factory was very fast. The inserts were packaged well and are 100% original."
⭐⭐⭐⭐⭐ "Highly Reliable" - S. Lim, Singapore
"Consistency is key in our production, and Tungaloy delivers every time. T9125 grade is perfect for our alloy steel shafts."
8. FAQ - Professional Support
Q: Can I use this L-hand insert in a right-hand holder?
A: No. To ensure proper chip evacuation and clearance, the hand of the insert (L) must match the hand of the tool holder.
Q: Is T9125 suitable for heavy roughing?
A: T9125 is a versatile grade, but for heavy, interrupted roughing, we suggest a tougher grade like T9225 or a larger corner radius.
Q: Does this fit SNMG 432L holders?
A: Yes, SNMG 120408L is the exact metric equivalent to the Imperial SNMG 432L specification.
Expert Machinist Insight: T9125 CVD Advantage
The T9125 grade is a specialized CVD coated carbide designed to solve the heat dissipation problems common in steel turning. By using a multi-layer coating with a smooth finish, it keeps the heat in the chip and away from the tool edge. Paired with the -S chipbreaker, it becomes a precision tool for achieving high-quality surface finishes in left-hand turning operations. Trust Tungaloy Japan for your most critical manufacturing cycles.
© Technical Data by cnchome-beyond.com - CNC Industrial Authority
