Tungaloy SCMT120404-24 T9125 Insert
High-Efficiency Steel Turning | 24 Precision Breaker | Premium T9125 CVD Grade
What is the best carbide insert for high-speed steel turning?
The Tungaloy SCMT120404-24 T9125 is a robust square carbide turning insert designed specifically for the high-speed processing of ISO P (Steel) materials. Featuring the world-renowned T9125 CVD coating, this insert provides an exceptional balance of wear resistance and toughness, making it ideal for continuous to light interrupted cuts. The 24 chipbreaker is engineered for finishing and medium cutting applications, delivering excellent chip control and reducing cutting forces. Made in Japan, these inserts are a favorite for CNC professionals seeking to maximize productivity while maintaining high surface integrity in carbon and alloy steels.
Premium T9125 CVD Grade
Combines a high-hardness Al2O3 layer with a tough TiCN base, offering superior heat resistance for high surface speeds (Vc).
24 Finishing Breaker
The positive rake angle design ensures sharp cutting action, reducing vibration and achieving Ra-standard surface finishes.
PremiumTec Treatment
Tungaloy's unique surface treatment smooths the coating, preventing chip welding and ensuring predictable tool life.
Decoding SCMT120404-24 Technical Nomenclature
S
Square
C
7° Relief
M
Tolerance
T
Hole/Fix
12
12.7mm Size
04
4.76mm Thick
04
0.4mm Rad.
24
Breaker
3. Technical Specifications: Metric vs. Imperial
| Feature |
Metric (ISO) |
Imperial Equiv. |
| Inscribed Circle (IC) |
12.70 mm |
1/2 inch |
| Thickness (S) |
4.76 mm |
3/16 inch |
| Corner Radius (RE) |
0.4 mm |
1/64 inch |
| Hole Diameter (D1) |
5.16 mm |
0.203 inch |
Recommended Cutting Parameters (T9125 Grade)
-
Cutting Speed (Vc): 150 - 350 m/min (Continuous Finish-Turning)
-
Feed Rate (f): 0.10 - 0.30 mm/rev (Breaker Optimization)
-
Depth of Cut (Ap): 0.5 - 3.0 mm (Medium to Finish)
*Pro Tip: For improved life in alloy steel, use high-pressure coolant directed at the cutting edge.*
4. Product Applications
- Outer and inner diameter turning of carbon steel.
- Machining of alloy steel shafts and large gears.
- Finishing operations on automotive structural parts.
- High-volume production lines for industrial fasteners.
5. Tool Compatibility
Fits standard SSDCN, SSKCR/L, and SSGCR/L turning tool holders designed for 12.7mm square inserts (Size 1204). Compatible with all major CNC lathe spindles.
7. Why Choose CNCHome-Beyond?
Genuine Tungaloy
100% Original Japan Stock
OEM Partnership
Supply Chain for Geely Auto
Expert Support
Technical Machining Guidance
Global Logistics
Fast Shipping to 50+ Countries
Verified Customer Feedback
⭐⭐⭐⭐⭐ "Workhorse Grade" - D. Miller, USA
"T9125 is my go-to for steel turning. Predictable tool life and handles high RPM without melting down."
⭐⭐⭐⭐⭐ "Excellent Chip Control" - K. Wagner, Germany
"The 24 breaker on these SCMT inserts works wonders on our CNC lathes. No birdnesting even on gummy steels."
⭐⭐⭐⭐ "Very Stable" - T. Sato, Japan
"Consistent results. Tungaloy quality is always impressive. Used for automotive gear production."
⭐⭐⭐⭐⭐ "Original Packaging" - G. Rossi, Italy
"Fast delivery and genuine products. Performance in 4140 alloy steel is outstanding."
⭐⭐⭐⭐⭐ "Great Price Performance" - A. Tan, Singapore
"Cheaper per part than our previous supplier. Tungaloy T9125 is much more durable at high feed rates."
8. FAQ - Machining Support
Q: Can I use T9125 for stainless steel?
A: T9125 is optimized for ISO P (Steel). For stainless steel (ISO M), we recommend Tungaloy AH series or T6130 grade.
Q: What is the benefit of the CVD coating?
A: CVD coatings are thicker than PVD, providing superior thermal protection and wear resistance at the higher temperatures found in high-speed turning.
Q: Does it fit SSDCN tool holders?
A: Yes, it is a standard ISO SCMT 1204 size and is perfectly compatible with SSDCN series holders.
Expert Tip: CVD vs. Cermet for Steel
While cermet offers a mirror finish, the T9125 CVD coated carbide is significantly tougher. If your part involves any interruption (like a cross-hole or keyway) or you need higher metal removal rates, the SCMT120404 T9125 is the safer, more productive choice for industrial-scale manufacturing.
© Technical Content by cnchome-beyond.com - Industrial Authority
