Tungaloy JTGR3130F J740 Grooving Insert
High-Precision 1.3mm External Grooving | PVD J740 Carbide | Made in Japan
What is the best 1.3mm insert for narrow grooving in stainless steel?
The Tungaloy JTGR3130F J740 is a specialized indexable grooving tool designed for high-accuracy external grooving. Built with the advanced J740 PVD coated carbide grade, this insert excels in machining difficult-to-cut materials like 304/316 stainless steel, titanium, and heat-resistant alloys. The 1.3mm cutting width (CW) and F-type chipbreaker provide exceptional edge sharpness and chip evacuation, which is critical for preventing built-up edge (BUE) in precision CNC machining. As an authentic Japan-made long-tail keywords optimized insert, it is the industry standard for maintaining tight tolerances and superior surface finish Ra, ensuring consistent tool life in high-demand production environments.
Decoding the JTGR3130F Technical Nomenclature
J
Mounting
T
External
G
Grooving
R
Right Hand
3130
1.3mm Width
F
Flat/Fine
J740
PVD Grade
Technical Specs: Metric vs. Imperial Units
| ISO Parameter |
Metric Unit |
Imperial Designation |
| Cutting Width (CW) |
1.30 mm |
0.0512 inch |
| Corner Radius (RE) |
0.10 mm |
0.0039 inch |
| ISO Model |
JTGR3130F |
JTGR 3.051F |
| Seat Size |
3 |
Series 3 |
Recommended Cutting Parameters (J740 Grade)
-
Cutting Speed (Vc): 40 - 130 m/min (Highly dependent on material hardness)
-
Feed Rate (f): 0.02 - 0.08 mm/rev (Optimize for 1.3mm stability)
-
Coolant: High-pressure coolant is strongly advised for narrow grooving.
*Pro Tip: For precision 1.30mm grooving, ensure the tool holder is perfectly aligned to the center. J740 provides excellent toughness, but alignment prevents vibration.*
Global Verified Customer Reviews
⭐⭐⭐⭐⭐ "Perfect for Snap Ring Grooves" - D. Hartmann, Germany
"The JTGR3130F J740 is our standard for 1.3mm grooves. Sharp edges and very predictable tool life on stainless steel 304."
⭐⭐⭐⭐⭐ "Outstanding Finish" - Matteo V., Italy
"Handles titanium aerospace components easily. The F breaker manages chips well even at higher feed rates."
⭐⭐⭐⭐ "Reliable Japan Quality" - Hiroshi T., Japan
"Very stable performance on our CNC Swiss machines. Clean slots with no burrs. J740 grade is very tough."
⭐⭐⭐⭐⭐ "Great Chip Control" - Chris B., USA
"No stringy chips. They curl and break perfectly. Reduced our machine downtime significantly."
⭐⭐⭐⭐⭐ "Authentic & Fast" - A. Clarke, UK
"Real Tungaloy stock. Best price for the durability you get. J740 grade doesn't smear the material."
Technical Tooling Q&A
Q: Is JTGR3130F suitable for high-speed parting?
A: This is primarily an external grooving insert. While it can perform light parting-off on small diameters, its flat geometry (F) is optimized for precision 1.3mm grooves.
Q: Which tool holder fits the JTGR3130F?
A: It is designed for Tungaloy J-Series external holders, such as the JCTEL/R series. Ensure the seat size matches the Series 3 inserts.
Q: Why use J740 over CVD grades?
A: J740 (PVD) provides higher edge toughness and sharpness, making it much more reliable for precision grooving and threading in gummy or hard alloys than CVD coatings.
Expert Insight: The Versatility of J740
In precision machining, J740 represents the peak of edge stability. While CVD coatings are optimized for high-volume turning, J740 provides the vibration resistance needed for the narrow slotting cycles of CNC grooving. Protect your indexable grooving tool with proper filtration.
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