Tungaloy RCMT0502MO-61 T9125 Insert
Stable Steel Turning | 61 Finishing Breaker | Versatile T9125 CVD Grade
What is the best round insert for interrupted steel cuts?
The Tungaloy RCMT0502MO-61 T9125 is a premium round carbide turning insert designed for high reliability across a wide range of steel machining applications. Powered by the T9125 CVD coated grade, this insert offers an ideal balance of wear resistance and toughness, making it the go-to choice for both continuous and interrupted cutting. The 61 chipbreaker is precision-engineered for finishing to light-duty turning, ensuring excellent chip evacuation and low cutting forces. Manufactured in Japan, this CNC turning insert provides the edge strength needed for difficult profiling and high-feed finishing on carbon and alloy steels.
Balanced T9125 Grade
Combines a high-toughness substrate with a specialized CVD coating to resist chipping during heavy or interrupted steel machining.
High Radius Edge Strength
The round (RCMT) geometry provides the strongest possible edge, distributing cutting forces evenly for maximum stability.
61 Finishing Breaker
Optimized for small depths of cut and precise feed rates, resulting in superior surface integrity and dimensions.
Decoding the RCMT0502MO-61 Technical Code
R
Round
C
7° Relief
M
Tolerance
T
Hole/Fix
05
5mm Size
02
2.38mm Thick
MO
Surface
61
Breaker
3. Technical Specifications: Metric vs. Imperial
| ISO Parameter |
Metric Units |
Imperial Designation |
| Inscribed Circle (IC) |
5.0 mm |
0.197 inch |
| Thickness (S) |
2.38 mm |
3/32 inch |
| Corner Radius (RE) |
2.5 mm (Full Round) |
0.098 inch |
| Hole Diameter (D1) |
2.3 mm |
0.091 inch |
Recommended Cutting Parameters (T9125 Grade)
-
Cutting Speed (Vc): 120 - 320 m/min (Highly versatile range)
-
Feed Rate (f): 0.05 - 0.20 mm/rev (For high-precision finish)
-
Depth of Cut (Ap): 0.2 - 1.2 mm
*Pro Advice: If your CNC setup experiences vibrations or has a keyway in the part, the T9125 grade provides the necessary toughness to prevent edge failure.*
4. Product Applications
- Profiling and finishing of carbon, alloy, and tool steels.
- Excellent for machining parts with cross-holes or keyways.
- Precision turning of small-diameter automotive components.
- Suitable for both Swiss-type CNCs and standard lathes.
5. Tool Compatibility
Designed for use with standard SRGCR/L or SRDCN turning tool holders for size 0502 (5mm IC) round inserts. High versatility for mixed production runs.
7. Why Choose CNCHome-Beyond?
Genuine Tungaloy
100% Original Japan
Industry Partner
Geely Auto Supplier
Expert Knowledge
Technical Guidance Available
Global Reach
Fast B2B Delivery
Global Verified Reviews
⭐⭐⭐⭐⭐ "Very Reliable Grade" - Stefan W., Germany
"T9125 is my favorite grade for all-around steel work. It handles the small interruptions on our splined shafts without any issues."
⭐⭐⭐⭐⭐ "Perfect for Small Parts" - Hiroshi K., Japan
"I use these for 5mm radii profiling. The finish is consistent and the round geometry is extremely strong."
⭐⭐⭐⭐ "Great Chip Evacuation" - David B., USA
"The 61 breaker works exactly as described. Small chips, no mess, even at low feed rates."
⭐⭐⭐⭐⭐ "Long Tool Life" - Claudio M., Italy
"Consistent performance over 200 parts. Minimal wear seen on the cutting edge."
⭐⭐⭐⭐⭐ "Original Quality" - Raj P., Singapore
"Arrived in original Tungaloy packaging. Performance is top-notch in alloy steel."
8. FAQ - Common Machining Questions
Q: Is T9125 better than T9115 for unstable setups?
A: Yes. T9125 has higher toughness, making it much more reliable than T9115 if your machine setup is less rigid or you are facing vibration.
Q: Can I use this for stainless steel?
A: T9125 is a dedicated steel grade (ISO P). While it can work on some stainless, we recommend Tungaloy AH630/AH645 for dedicated stainless steel tasks.
Q: What tool holder do I need?
A: You need an SRGCR or SRDCN holder with a pocket size for 5mm round inserts (0502 size).
Expert Insight: The Versatility of T9125
In CNC production, the T9125 grade is considered the 'all-rounder'. Its unique CVD coating structure offers enough toughness to survive interrupted cuts while maintaining the wear resistance required for high-speed finishing. This makes the RCMT0502 extremely versatile for diverse workshop requirements.
© Technical Data by cnchome-beyond.com - CNC Industrial Experts
