Tungaloy JTGR3275F J740 PVD Coated External Grooving Insert

$200.17 USD

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Description

Tungaloy JTGR3275F J740 Grooving Insert

High-Precision 2.75mm External Grooving | PVD J740 Carbide | Made in Japan

What is the most reliable 2.75mm insert for grooving tough alloys?

The Tungaloy JTGR3275F 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 2.75mm 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 JTGR3275F Technical Nomenclature

J
Mounting
T
External
G
Grooving
R
Right Hand
3275
2.75mm Width
F
Fine/Flat
J740
PVD Grade

Technical Specs: Metric vs. Imperial Units

ISO Parameter Metric Unit Imperial Designation
Cutting Width (CW) 2.75 mm 0.1083 inch
Corner Radius (RE) 0.20 mm 0.0078 inch
Model Number JTGR3275F JTGR 3.108F
Seat Size 3 Series 3

Recommended Cutting Parameters (J740 Grade)

  • Cutting Speed (Vc): 40 - 140 m/min (Material dependent)
  • Feed Rate (f): 0.03 - 0.14 mm/rev (Optimized for 2.75mm width)
  • Coolant: High-pressure coolant recommended for chip control.

*Pro Tip: For 2.75mm slots, verify center height to prevent deflection. J740 provides high toughness for interrupted grooving cycles.*

Global Verified Customer Reviews

⭐⭐⭐⭐⭐ "Standard for 2.75mm Snap Ring Grooves" - Matthias W., Germany
"The JTGR3275F J740 is our absolute standard for hydraulic components. Consistent tool life and very stable width."

⭐⭐⭐⭐⭐ "Perfect for Stainless 316" - J. Rossi, Italy
"Handles 304 and 316 stainless steel with ease. No smearing on the material, just clean and shiny grooves. PVD coating is top tier."

⭐⭐⭐⭐ "Great for Aerospace" - David L., USA
"Used on Swiss machines for Inconel parts. The J740 grade handles heat much better than other brands I have used in the past."

⭐⭐⭐⭐⭐ "Authentic Quality" - T. Nguyen, Vietnam
"Authentic Tungaloy quality. Maintains precision even after long shifts. Highly recommended for CNC production line."

⭐⭐⭐⭐⭐ "Reliable Performance" - S. Clarke, UK
"Fast shipping and genuine product. The F breaker geometry is perfect for maintaining low cutting forces."

Technical Tooling Q&A

Q: Is JTGR3275F suitable for parting-off?

A: This is specifically an external grooving insert. While it can perform light parting-off on small diameters, its flat geometry (F) is best optimized for precision grooves.

Q: Which tool holder do I need for this 2.75mm insert?

A: It is designed for Tungaloy J-Series external holders, such as the JCTEL/R series. Match the seat size for Series 3 inserts.

Q: Why use J740 over CVD grades for grooving?

A: J740 (PVD) provides a sharper cutting edge and higher toughness, which is critical for narrow grooving where vibration is more likely than heavy CVD turning.

Expert Insight: PVD Coating Advantage

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.