Tungaloy JTGR3140F J740 PVD Coated External Grooving Insert

$200.17 USD

Price shown is a starting point. Contact us for a precise quote based on your requirements.

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Description

Tungaloy JTGR3140F J740 Grooving Insert

High-Precision 1.4mm External Grooving | PVD J740 Carbide | Made in Japan

What is the best 1.4mm insert for precision grooving in difficult alloys?

The Tungaloy JTGR3140F J740 is a premier indexable grooving tool specifically engineered for high-accuracy external grooving. Utilizing the high-performance J740 PVD coated carbide grade, this insert excels in machining tough materials like 304/316 stainless steel, titanium, and heat-resistant superalloys. The 1.4mm 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 cycles.

Decoding the JTGR3140F Technical Nomenclature

J
Mounting
T
External
G
Grooving
R
Right Hand
3140
1.4mm Width
F
Fine/Flat
J740
PVD Grade

Technical Specs: Metric vs. Imperial Units

ISO Parameter Metric Unit Imperial Designation
Cutting Width (CW) 1.40 mm 0.0551 inch
Corner Radius (RE) 0.10 mm 0.0039 inch
Model Number JTGR3140F JTGR 3.055F
Seat Size 3 Series 3

Recommended Cutting Parameters (J740 Grade)

  • Cutting Speed (Vc): 40 - 140 m/min (Depending on material group)
  • Feed Rate (f): 0.02 - 0.09 mm/rev
  • Coolant: High-pressure coolant is highly recommended for 1.4mm narrow slots.

*Pro Tip: For 1.40mm precision grooving, verify tool center height exactly to prevent rubbing and ensure superior surface Ra. J740 provides high toughness for interrupted grooving cycles.*

Global Verified Customer Reviews

⭐⭐⭐⭐⭐ "Reliable for 1.4mm Slots" - Matthias S., Germany
"The JTGR3140F J740 is our go-to for hydraulic components. Very stable 1.4mm width and excellent tool life on stainless steel."

⭐⭐⭐⭐⭐ "Japan Quality Indeed" - T. Nguyen, Vietnam
"Consistent results every box. These Tungaloy inserts maintain a sharp edge much longer than generic alternatives."

⭐⭐⭐⭐ "Great for Swiss Lathes" - Chris D., USA
"Used on Citizen machines for aerospace fasteners. The 1.4mm groove is clean and the chips are well-managed."

⭐⭐⭐⭐⭐ "Top Grade for Stainless" - Alessandro B., Italy
"J740 grade doesn't smear the material. Perfect for the medical grade 316 we process daily."

⭐⭐⭐⭐⭐ "Genuine & Fast" - A. Clarke, UK
"Always receive authentic Tungaloy parts. Best price-to-performance ratio for precision grooving."

Technical Tooling Q&A

Q: Is JTGR3140F 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 1.4mm wide grooves.

Q: Which tool holder do I need for this insert?

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: Why use J740 over CVD grades?

A: J740 (PVD) provides higher edge sharpness and toughness, making it far superior for vibration-sensitive precision grooving than thicker CVD coatings.

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 filtered coolant.

© Technical Content by cnchome-beyond.com - Japan Tooling Excellence

Technical FAQ & Buying Guide

Are your carbide inserts interchangeable with major brands like Sandvik, Iscar, or Kennametal?

Absolutely. Our CNC carbide inserts (including CNMG, WNMG, DNMG, and APMT series) are manufactured strictly adhering to international ISO/ANSI specifications. A CNMG 120408 from OYYU BEYOND will flawlessly fit any standard turning tool holder or indexable tool from major global brands like Sandvik Coromant, Kennametal, Iscar, Walter, or SECO, providing a highly cost-effective premium alternative without sacrificing tolerance or tool life.

How do I choose the correct insert grade and chipbreaker for machining Stainless Steel (M) vs. Carbon Steel (P)?

We offer optimized CVD and PVD multi-layer coatings for different ISO material groups:

  • For Carbon/Alloy Steel (ISO P): Choose our thick multi-layer CVD coated grades (e.g., Al2O3 + TiN). They provide exceptional crater wear resistance and thermal barriers during high-speed dry or wet roughing.
  • For Stainless Steel (ISO M): Choose our nano-structured PVD coated grades with sharp, positive chipbreakers (like -TM or -MA). This combination prevents work hardening and effectively controls sticky chips.
What are the recommended cutting speed (Vc) and feed rate (f) parameters to maximize tool life?

The optimal cutting parameters vary depending on the workpiece hardness and operation type:

  • For General Steel Turnings: Recommended cutting speed ($V_c$) ranges from 150 to 280 m/min, with a feed rate ($f$) of 0.15 to 0.45 mm/rev.
  • For Stainless Steel Finishing: Recommended cutting speed ($V_c$) is 120 to 200 m/min, with a feed rate ($f$) of 0.10 to 0.25 mm/rev.Always adjust parameters based on early wear patterns: increase $V_c$ if built-up edge occurs, or reduce $V_c$ if severe flank wear is observed.
Do you offer bulk discounts or wholesale pricing for machine shops and distributors?

Yes, we support machine shops, distributors, and global buyers with tiered wholesale pricing and competitive volume discounts. We also provide OEM custom manufacturing solutions for tool holders and carbide inserts based on your technical drawings. Contact our team to request a quick B2B quotation.

What is your international shipping policy and typical lead time for orders?

We provide secure worldwide express shipping (via DHL, FedEx, and UPS) with specialized, vibration-proof industrial packaging to ensure tools arrive in perfect condition. In-stock items are dispatched within 24-48 hours, while custom or bulk orders typically have a stable lead time of 15-25 days.

How do you guarantee the quality and tolerance precision of your CNC tools?

All our cutting tools and tool holders are manufactured strictly in accordance with ISO 9001 and international industrial standards. Every batch undergoes 100% rigorous quality control testing using high-precision optical measuring equipment to ensure reliable tool life and stable performance in continuous mass production.