Tungaloy JTGR3050F J740 Grooving Insert
High-Precision External Grooving | Specialized J740 PVD Grade | Japan Excellence
What is the best insert for zero-lead angle grooving in tough alloys?
The Tungaloy JTGR3050F J740 is a premier indexable grooving tool specifically engineered for high-accuracy external grooving. The J740 PVD coated carbide grade is the professional choice for machining stainless steel and heat-resistant superalloys, providing unmatched resistance to built-up edge (BUE) and notch wear. Featuring a 0.50mm cutting width and a specialized chipbreaker for narrow grooving, this CNC machining insert ensures incredible surface integrity. As a Japan-made high-performance tool, this long-tail keywords optimized insert provides extended tool life and repeatability, making it a critical component for aerospace and medical manufacturing.
Decoding the JTGR3050F Technical Nomenclature
J
Mounting
T
External
G
Grooving
R
Right Hand
3050
0.5mm Width
F
Fine/Flat
J740
PVD Grade
Technical Specs: Metric vs. Imperial Units
| ISO Parameter |
Metric Unit |
Imperial Designation |
| Cutting Width (CW) |
0.50 mm |
0.0197 inch |
| Corner Radius (RE) |
0.05 mm |
0.0020 inch |
| Lead Angle |
0° (Neutral Fine) |
Neutral Lead |
| Mounting Type |
J-Series Type |
J-Type Tooling |
Recommended Cutting Parameters (J740 Grade)
-
Cutting Speed (Vc): 40 - 130 m/min (Material dependent)
-
Feed Rate (f): 0.01 - 0.05 mm/rev (Specialized for thin grooves)
-
Coolant: Required for heat control in narrow slots.
*Pro Tip: For 0.5mm grooving, ensure the tool holder is perfectly aligned to the spindle center to prevent edge chipping during entry.*
Customer Feedback Across the Globe
⭐⭐⭐⭐⭐ "Incredible for micro-grooving" - Matthias K., Germany
"The precision of JTGR3050F is unmatched. We used it for specialized electronic connectors in stainless. 0.5mm width is spot on."
⭐⭐⭐⭐⭐ "J740 lasts longer" - Robert S., USA
"Tougher than other PVD grades I've tried. No built-up edge on Inconel parts. Excellent Tungaloy quality."
⭐⭐⭐⭐ "Very stable cuts" - Hiro K., Japan
"Standard choice for our precision lathes. The chip control at this narrow width is very reliable."
⭐⭐⭐⭐⭐ "Beautiful Finish" - Alessandro B., Italy
"Used for aerospace hydraulic fittings. The surface finish is better than expected for a carbide insert."
⭐⭐⭐⭐⭐ "Fast Shipping" - A. Clarke, UK
"Authentic Tungaloy parts. The J740 grade is perfect for our 304 stainless jobs."
Technical Tooling Q&A
Q: Is JTGR3050F suitable for parting off?
A: This is primarily an external grooving insert. While it can perform very light parting on small diameters, its flat geometry (F) is optimized for precision grooves.
Q: Why choose J740 over cermet grades?
A: J740 (PVD Carbide) provides significantly higher toughness. If your material is stainless steel or has interruptions, J740 will resist chipping far better than a cermet.
Q: Does it fit my existing holder?
A: It is designed for Tungaloy J-Series external holders (JCTEL/R). Please verify the seat size of your holder before installation.
Expert Insight: J740 PVD Versatility
In precision machining, J740 is the go-to grade for thermal resistance. While CVD coatings are for high-speed roughing, J740 provides the sharp, vibration-resistant edge needed for the delicate cycles of CNC grooving. Always ensure high-quality coolant is used.
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