Tungaloy DCGT070202FR-J10 J740 Precision Finishing Turning Insert

$109.39 USD

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

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Description

Tungaloy DCGT070202FR-J10 J740 Turning Insert

Precision Finishing Expert | Ultra-Sharp J10 Geometry | Made in Japan

What is the best carbide insert for precision finishing on small parts?

The Tungaloy DCGT070202FR-J10 J740 is a premium, high-accuracy PVD coated carbide turning insert specifically engineered for fine finishing operations. Utilizing the J740 grade, which combines a tough carbide substrate with a specialized PVD coating, this insert excels in machining steel, stainless steel, and heat-resistant alloys. This indexable turning tool features the highly acclaimed -J10 chipbreaker, known for its ultra-sharp cutting edge and ground-periphery accuracy, which minimizes cutting forces and prevents built-up edge. Whether you are performing CNC machining on Swiss-type lathes or small-part turning, this Japan-made precision machining tool delivers an mirror-like surface finish and exceptional tool life. By integrating this long-tail keywords optimized insert into your workflow, you guarantee dimensional stability for your most critical components.

Decoding the DCGT070202FR-J10 Technical Nomenclature

D
55° Rhombic
C
7° Clearance
G
G Tolerance
T
Hole & Screw
07
7mm Edge
02
2.38mm Thick
02
0.2mm Radius
FR
Right Hand

Technical Specs: Metric vs. Imperial Comparison

Feature Detail Metric Designation Imperial Equiv.
ISO / ANSI Model DCGT070202FR-J10 DCGT21.50.5FR-J10
Inscribed Circle (IC) 6.35 mm 1/4 inch
Corner Radius (RE) 0.2 mm 0.008 inch

Why is the J740 grade and J10 chipbreaker the top choice for finish turning?

The J740 PVD Grade is characterized by its high adhesion resistance and smooth coating surface, which is essential for maintaining tight tolerances and preventing work-hardening of the material. The -J10 chipbreaker is specifically designed for finishing and light-duty cutting. Its positive rake angle and sharp cutting edge allow for low-vibration machining even on slender workpieces. In precision machining, this indexable turning tool minimizes heat generation, ensuring the physical properties of the workpiece remain intact. For CNC machining shops focusing on medical, aerospace, or electronic components, the DCGT070202FR-J10 provides the reliable accuracy needed for high-quality production.

Recommended Cutting Parameters for J740

  • Cutting Speed (Vc): 50 - 150 m/min
  • Feed Rate (f): 0.03 - 0.12 mm/rev
  • Depth of Cut (ap): 0.1 - 1.0 mm

*Pro Tip: Use a high-quality tool holder with minimal runout to fully leverage the G-tolerance precision of this insert.*

Feedback from Global Precision Workshops

⭐⭐⭐⭐⭐ "Perfect for Swiss Turning" - Sarah M., Switzerland
"We use these for finishing tiny stainless shafts. The surface finish is consistently under 0.8 Ra. The J740 grade doesn't chip on the fine radius."

⭐⭐⭐⭐⭐ "Incredible Sharpness" - Tom H., USA
"The J10 geometry is so sharp it cuts through alloy steel with almost zero pressure. Great for preventing deflection on long parts."

⭐⭐⭐⭐ "Very Reliable" - Guillaume D., France
"Very predictable tool life. We run these on our Citizen lathes and rarely have to adjust offsets between shifts."

⭐⭐⭐⭐⭐ "Best for Finishing" - Akira S., Japan
"High precision G-class tolerance. For precision finishing of small components, Tungaloy J740 is my first choice."

⭐⭐⭐⭐⭐ "Authentic Quality" - Liam N., Australia
"Original Tungaloy inserts delivered on time. The performance on alloy steel is exactly what we expected from a Japanese tool."

Technical Precision Q&A

Q: What materials can the J740 grade handle?

A: J740 is a versatile PVD grade. It is excellent for Steel (P), Stainless Steel (M), and Heat Resistant Alloys (S) in finishing applications.

Q: Why is the FR suffix important?

A: "FR" indicates a right-hand, front-cutting orientation. Ensure your tool holder matches this orientation for proper chip flow and geometry engagement.

Q: How does the 0.2mm radius affect machining?

A: A small radius (0.2mm) allows for extremely fine detail and sharp corners. It also reduces cutting pressure, which is vital for thin-walled or slender workpieces.

Expert Insight: PVD Coating for Fine Finishing

For precision machining where surface Ra is critical, PVD Coated Carbide (J740) provides the sharpest edge and best finish. The J10 geometry ensures that even at low feed rates, the chip is controlled and the part quality remains world-class.

© 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.