Tungaloy JTGR3100F J740 Grooving Insert
Professional 1.0mm External Grooving | PVD J740 Carbide | Made in Japan
What is the most reliable insert for 1.0mm grooving in stainless steel?
The Tungaloy JTGR3100F J740 is a high-precision indexable grooving tool designed for ultra-accurate external grooving operations. Engineered with the high-performance 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 1.0mm cutting width (CW) and F-type chipbreaker provide exceptional chip evacuation and edge sharpness, preventing built-up edge (BUE) in "gummy" materials. As a Japan-made CNC machining solution, this long-tail keywords optimized insert is the industry standard for maintaining tight tolerances and superior surface finish Ra. Incorporating these into your workflow ensures consistent tool life and reduced machine downtime.
Decoding the JTGR3100F Technical Nomenclature
J
Mounting
T
External
G
Grooving
R
Right Hand
3100
1.0mm Width
F
Flat/Fine
J740
PVD Grade
Technical Specs: Metric vs. Imperial Conversion
| ISO Parameter |
Metric Unit |
Imperial Designation |
| Cutting Width (CW) |
1.00 mm |
0.0394 inch |
| Corner Radius (RE) |
0.10 mm |
0.0039 inch |
| Max Grooving Depth |
Check Holder Capacity |
J-Series Type |
| Hand Orientation |
Right Hand (R) |
Right Hand |
Recommended Cutting Parameters (J740 Grade)
-
Cutting Speed (Vc): 40 - 130 m/min (Highly dependent on workpiece material)
-
Feed Rate (f): 0.02 - 0.08 mm/rev
-
Coolant: High-pressure coolant is strongly advised for 1.0mm slotting.
*Pro Tip: For 1.0mm precision grooving, ensure your CNC tool offset is calibrated perfectly to the center. J740 is incredibly tough, but alignment is key to preventing vibration.*
Global Verified Customer Reviews
⭐⭐⭐⭐⭐ "Standard for 1.0mm Slots" - Matteo V., Italy
"The JTGR3100F is my go-to for hydraulic valve components. The 1.0mm width is extremely stable and the J740 grade handles stainless 316 without breaking a sweat."
⭐⭐⭐⭐⭐ "Exceptional Tool Life" - S. Tanaka, Japan
"Very sharp and clean cuts. The PVD coating is durable and resists notch wear even on tough carbon steel."
⭐⭐⭐⭐ "Great Performance on Swiss Lathes" - Chris B., USA
"Used these on a Citizen machine for medical shafts. Precision 1.0mm grooves with zero vibration. Highly recommend Tungaloy J-Series."
⭐⭐⭐⭐⭐ "Reliable Chip Control" - Hans M., Germany
"No stringy chips. The F chipbreaker curls them perfectly out of the narrow groove. Reduces the risk of bird-nesting."
⭐⭐⭐⭐⭐ "Best Price for Quality" - A. Clarke, UK
"Fast shipping and authentic J740 stock. These inserts outperform cheaper alternatives every single time."
Technical Tooling Q&A
Q: Is JTGR3100F better for grooving or parting?
A: This is specifically an external grooving insert. While it can perform light parting-off on small diameters, its primary function is creating precision 1.0mm wide grooves.
Q: Which tool holder fits the JTGR3100F?
A: It is designed for Tungaloy J-Series external holders, such as the JCTEL/R series. Please match the seat size for the 3xxx series inserts.
Q: Can J740 handle high-temp alloys like Inconel?
A: Yes, J740 is a versatile PVD grade known for high thermal stability and toughness, making it suitable for moderate speeds in heat-resistant superalloys.
Expert Insight: The Power of J740 PVD Grade
In precision machining, J740 represents the peak of edge toughness. While CVD coatings are optimized for high-volume steel roughing, J740 provides the sharp stability needed for the narrow slotting cycles of CNC grooving. Always verify your lead angle requirements for maximum accuracy.
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