Tungaloy JTGR3180F J740 Grooving Insert
High-Precision 1.8mm External Grooving | PVD J740 Carbide | Made in Japan
What is the best 1.8mm insert for narrow grooving in titanium and stainless?
The Tungaloy JTGR3180F J740 is a high-performance indexable grooving tool specifically engineered for precision external grooving operations. Utilizing the industry-leading J740 PVD coated carbide grade, this insert provides exceptional wear resistance and edge toughness when machining difficult materials like 304/316 stainless steel, heat-resistant alloys, and titanium. The 1.8mm cutting width (CW) and F-type chipbreaker (Flat geometry) ensure superior chip evacuation and edge sharpness, which is critical for preventing built-up edge (BUE) in CNC machining. As an authentic Japan-made grooving insert, it is the professional choice for maintaining tight tolerances and superior surface finish Ra in high-demand production environments.
Decoding the JTGR3180F Technical Nomenclature
J
Mounting
T
External
G
Grooving
R
Right Hand
3180
1.8mm Width
F
Fine/Flat
J740
PVD Grade
Technical Specs: Metric vs. Imperial Units
| ISO Parameter |
Metric Unit |
Imperial Designation |
| Cutting Width (CW) |
1.80 mm |
0.0709 inch |
| Corner Radius (RE) |
0.10 mm |
0.0039 inch |
| Model Number |
JTGR3180F |
JTGR 3.071F |
| 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 - 0.12 mm/rev
-
Coolant: High-pressure coolant is strongly advised for 1.8mm narrow grooves.
*Pro Tip: Ensure tool center height is precisely aligned to prevent vibration and uneven wear. J740 provides excellent toughness for interrupted cuts.*
Global Verified Customer Reviews
⭐⭐⭐⭐⭐ "Standard for 1.8mm Slots" - Heinrich K., Germany
"The JTGR3180F J740 is my standard choice for 1.8mm snap ring grooves. Stable, predictable, and clean."
⭐⭐⭐⭐⭐ "Japan Quality Indeed" - T. Nguyen, Vietnam
"Authentic Tungaloy quality. Maintains precision even after long shifts on 304 stainless steel parts."
⭐⭐⭐⭐ "Great for Aerospace" - Michael B., USA
"Used on Swiss-style lathes for titanium components. The F geometry handles chips perfectly with no tangling."
⭐⭐⭐⭐⭐ "Superior Edge Strength" - Alessandro B., Italy
"J740 grade doesn't chip easily on interrupted cuts. Better than several other European brands I've tried."
⭐⭐⭐⭐⭐ "Fast Shipping & Genuine" - S. Clarke, UK
"Best price for genuine stock. The 1.8mm width is held with extreme precision across the entire batch."
Technical Tooling Q&A
Q: Is JTGR3180F suitable for high-speed parting?
A: This is specifically an external grooving insert. While it can perform light parting-off on small diameters, its flat geometry (F) is optimized for precision 1.8mm grooves.
Q: Which tool holder do I need for this 1.8mm insert?
A: It is designed for Tungaloy J-Series external holders, such as the JCTEL/R series. Ensure you match the seat size for Series 3 inserts.
Q: Why use J740 over CVD grades for narrow grooving?
A: J740 (PVD) provides a sharper cutting edge and higher toughness, which is critical for narrow grooving where vibration is more likely than in heavy CVD turning.
Expert Insight: PVD vs. CVD in Grooving
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. Protect your indexable grooving tool with proper coolant filtration.
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