Tungaloy TNMG220404R-S T9125 Turning Insert
Professional Right-Hand Machining | T9125 CVD Technology | RS Finishing Geometry
What is the best 22mm right-hand insert for high-speed steel finishing?
The Tungaloy TNMG220404R-S T9125 is a premium, industrial-grade turning insert designed for specialized right-hand (R) machining cycles. Engineered for precision finishing of carbon and alloy steels, this 22mm size insert provides maximum rigidity and stability in heavy-duty CNC environments. Featuring the T9125 CVD coated carbide grade, it excels in heat resistance and edge retention. The -S (RS) chipbreaker is specialized for light-duty finishing, delivering exceptional chip control and a superior surface finish. 100% Made in Japan, it is the standard for high-performance B2B machining applications.
T9125 CVD Grade
Designed with a thick Al2O3 layer for extreme heat resistance. This grade prevents crater wear and plastic deformation during high-speed continuous turning.
RS (-S) Finishing Chipbreaker
A sharp, precision-ground geometry that reduces cutting forces. It manages chips effectively even at low depths of cut, ensuring a mirror-like finish.
22mm Heavy Rigidity
The TNMG 22 size offers a larger contact area for the tool holder, significantly reducing vibration and improving accuracy in larger workpieces.
Decoding TNMG 220404R-S Nomenclature
T
Tri
N
0°
M
Tol.
G
D-Side
22
Size
04
Thk
04
0.4 Rad
R
RH
-S
Chip
3. Technical Data: Metric (ISO) vs. Imperial (ANSI)
| Technical Feature |
Metric (ISO) |
Imperial (ANSI) |
| Standard Model |
TNMG220404R-S |
TNMG 431R-S |
| Inscribed Circle (IC) |
12.7 mm |
1/2" |
| Thickness (S) |
4.76 mm |
3/16" |
| Corner Radius (RE) |
0.4 mm |
1/64" |
Recommended Finishing Parameters (Steel)
-
Cutting Speed (Vc): 150 - 320 m/min
-
Feed Rate (f): 0.05 - 0.20 mm/rev
-
Depth of Cut (ap): 0.2 - 1.5 mm
*Pro-Tip: Maintaining high cutting speeds with T9125 grade provides peak luster. High-pressure coolant is recommended for deep-finishing applications.*
4. Primary Applications
- Precision finishing of carbon and alloy steels (P15-P30).
- Final dimensioning of large diameter shafts and valves.
- Boring operations requiring right-hand tool rotation.
- Automotive components with tight tolerance requirements.
5. Tool Compatibility
Fits all standard ISO/ANSI TNMG 2204 tool holders. Optimized for Right-Hand (RH) configurations like MTJNR or WTJNR. Compatible with DMG Mori, Mazak, and Okuma CNC machines.
7. Why Source from CNCHome-Beyond?
100% Original
Tungaloy Japan Stock
Technical Experts
Global B2B Support
Global Logistics
Express Air Delivery
Verified Stock
Factory Sealed Packaging
Customer Feedback from Global Operations
⭐⭐⭐⭐⭐ "Incredible Stability" - James K., USA
"The larger 22 size is rock solid. We use these for finishing 4140 steel shafts. The right-hand geometry is exactly what our CNC setup needed."
⭐⭐⭐⭐⭐ "Original Quality" - Markus D., Germany
"Exactly as described. Authentic Tungaloy boxes. The T9125 grade provides a very predictable wear pattern over long shifts."
⭐⭐⭐⭐ "Great Chip Management" - Hiroshi S., Japan
"Consistent results. The -S chipbreaker manages long-stringy chips perfectly even at shallow depths of cut."
⭐⭐⭐⭐⭐ "Reliable B2B Partner" - Carlos M., Mexico
"Beyond always provides original stock. Fast shipping to our factory. The technical data provided was very accurate for our setup."
⭐⭐⭐⭐⭐ "Excellent Finish" - Alistair M., UK
"Precise radius and very sharp cutting edge. The surface finish on our finished parts is mirror-like. Best value for Tungaloy."
8. FAQ - Machine Shop Support
Q: What is the benefit of the TNMG 22 size over the 16 size?
A: The TNMG 22 size offers a larger mass and seating area, which leads to better heat dissipation and significantly higher rigidity during finishing of larger workpieces.
Q: Can I use T9125 for stainless steel?
A: T9125 is optimized for carbon and alloy steels (P-group). For stainless steel finishing, Tungaloy's T6100 series or AH series grades are recommended.
Q: Why choose the -S chipbreaker?
A: The -S (RS) chipbreaker is specifically designed for light finishing. It reduces cutting resistance and prevents vibration, which is crucial for achieving high surface quality.
Tech Tip: Optimizing CVD Performance
To maximize tool life with **T9125**, maintain a high cutting speed to prevent built-up edge (BUE). High speeds allow the CVD coating to work at peak thermal efficiency. **Tungaloy Japan** - Engineering excellence for precision machining.
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