Tungaloy RCMT0803MO-61 T9125 Insert
Universal Steel Turning | 61 Finishing Breaker | Versatile T9125 CVD Grade
How do I choose the best round insert for general steel machining?
The Tungaloy RCMT0803MO-61 T9125 is a high-reliability round carbide turning insert designed for high versatility in steel machining. Powered by the T9125 CVD coated grade, this insert excels in both continuous and interrupted cutting operations, providing the perfect balance between wear resistance and fracture toughness. The 61 chipbreaker is specialized for light-duty finishing to semi-finishing, offering excellent chip management at high speeds. This Japan-made CNC turning insert is the industry standard for profiling carbon and alloy steels where stability and edge strength are critical.
Balanced T9125 CVD Grade
Features a high-toughness substrate paired with a multi-layered coating to prevent chipping in unstable or interrupted cutting conditions.
Superior Edge Strength
The round (RCMT) geometry offers maximum cutting edge strength, ideal for heavy profiling and varying feed directions.
Excellent Chip Control
The 61 breaker is designed for light finishing passes, minimizing cutting resistance and ensuring a smooth surface finish.
Decoding the RCMT0803MO-61 Nomenclature
R
Round
C
7° Relief
M
Tolerance
T
Hole/Fix
08
8mm Size
03
3.18mm Thick
MO
Detail
61
Breaker
3. Technical Specifications: Metric vs. Imperial
| ISO Parameter |
Metric Units |
Imperial Designation |
| Inscribed Circle (IC) |
8.0 mm |
0.315 inch |
| Thickness (S) |
3.18 mm |
1/8 inch |
| Corner Radius (RE) |
4.0 mm (Full Round) |
0.157 inch |
| Hole Diameter (D1) |
3.4 mm |
0.134 inch |
Recommended Cutting Parameters (T9125 Grade)
-
Cutting Speed (Vc): 120 - 350 m/min (Highly versatile)
-
Feed Rate (f): 0.05 - 0.25 mm/rev (Precision finishing)
-
Depth of Cut (Ap): 0.2 - 2.0 mm (Semi-finishing)
*Pro Advice: If you encounter heavy vibrations or interrupted cuts on shafts with keyways, T9125 grade provides the necessary stability to prevent corner chipping.*
4. Product Applications
- Profiling and finishing of carbon, alloy, and mold steels.
- Machining of large automotive shafts and precision components.
- Excellent for parts with interrupted surfaces or cross-holes.
- Designed for high-stability profiling in both wet and dry cuts.
5. Tool Compatibility
Perfectly compatible with standard SRGCR/L or SRDCN turning tool holders designed for 8mm round positive inserts (Size 0803). Suitable for rigid CNC setups.
7. Why Choose CNCHome-Beyond?
Genuine Tungaloy
100% Original Japan
OEM Authority
Supplier to Geely Auto
Expert Support
CNC Tooling Specialists
Global Logistics
Fast Shipping Worldwide
Global Verified Reviews
⭐⭐⭐⭐⭐ "Extremely Versatile" - Markus F., Germany
"T9125 is the best 'all-rounder'. We use these for profiling all types of steel. The tool life is very consistent."
⭐⭐⭐⭐⭐ "Great for Interrupted Cuts" - Takeshi S., Japan
"I was worried about edge chipping on splined shafts, but this round insert handled it perfectly. Zero chipping."
⭐⭐⭐⭐ "Smooth Surface Finish" - Brian L., USA
"The 61 breaker leaves a glass-like finish on alloy steels. Great chip control at shallow depths."
⭐⭐⭐⭐⭐ "Highly Recommended" - Roberto V., Italy
"Authentic Tungaloy parts. The edge strength of the RCMT0803 is far superior for heavy profiling."
⭐⭐⭐⭐⭐ "Excellent Quality" - S. Ramesh, Singapore
"Consistent performance across large batches. Fast delivery from cnchome-beyond."
8. FAQ - Technical Support
Q: Can I use T9125 for stainless steel?
A: T9125 is optimized for ISO P (Steel). For ISO M (Stainless Steel), we suggest Tungaloy AH630 or AH645 grades.
Q: What is the main benefit of the round shape?
A: Round inserts provide the highest edge strength and allow for profiling in multiple directions with much higher feed rates than diamond shapes.
Q: Is this suitable for dry machining?
A: Yes, the T9125 CVD coating is designed to handle high thermal loads, making it suitable for both wet and dry steel turning.
Expert Insight: The Stability of T9125
In high-precision CNC machining, the T9125 grade acts as the universal choice. It provides enough toughness to survive interrupted cuts while maintaining the wear resistance for high-speed finish. This balance makes the RCMT0803 extremely reliable for workshops running a wide variety of steel alloys.
© Technical Data by cnchome-beyond.com - Industrial Authority
