Tungaloy DCGT11T301FR-J10 J740 Turning Insert
High-Precision Finishing Expert | Ultra-Sharp J10 Geometry | Made in Japan
What is the best insert for ultra-fine surface finishing in precision turning?
The Tungaloy DCGT11T301FR-J10 J740 is a high-accuracy precision finishing turning insert designed specifically for applications requiring tight tolerances and superior surface Ra values. Utilizing the versatile J740 PVD grade, this insert features a tough carbide substrate paired with a thin, smooth coating that excels in machining steel, stainless steel, and heat-resistant alloys. This indexable turning tool is equipped with the -J10 chipbreaker, world-renowned for its ultra-sharp cutting edge and ground periphery, which minimizes cutting resistance and prevents built-up edge (BUE). Whether you are performing CNC machining on Swiss-type lathes or intricate small-part turning, this Japan-made precision machining tool ensures exceptional tool life and dimensional consistency. By implementing this long-tail keywords optimized insert, you achieve the highest reliability for critical finishing cycles.
Decoding the DCGT11T301FR-J10 Technical Nomenclature
D
55° Rhombic
C
7° Clearance
G
G Tolerance
T
Hole & Screw
11
11.6mm Edge
T3
3.97mm Thick
01
0.1mm Radius
FR
Right Hand
Technical Specs: Metric vs. Imperial Comparison
| Standard Detail |
Metric Designation |
Imperial Equiv. |
| Product Model |
DCGT11T301FR-J10 |
DCGT32.50.2FR-J10 |
| Inscribed Circle (IC) |
9.525 mm |
3/8 inch |
| Corner Radius (RE) |
0.1 mm |
0.004 inch |
Why is the 0.1mm radius and J740 grade essential for precision?
The J740 PVD Grade is a high-performance coating specifically designed to provide a smooth cutting action and superior resistance to wear at low feeds. In precision machining, the 0.1mm corner radius of the DCGT11T301FR-J10 allows for the creation of extremely fine details and sharp corners without sacrificing edge strength. The -J10 chipbreaker geometry features a positive rake angle that significantly reduces cutting pressure, which is vital when machining slender parts or thin-walled components to prevent deflection. For CNC machining operators, this indexable turning tool is the definitive choice for finishing operations where the surface quality cannot be compromised.
Recommended Cutting Parameters for J740
-
Cutting Speed (Vc): 60 - 160 m/min
-
Feed Rate (f): 0.02 - 0.10 mm/rev
-
Depth of Cut (ap): 0.05 - 0.8 mm
*Pro Tip: Ensure your machine has minimal vibration and runout to fully utilize the 0.1mm radius for maximum precision.*
Feedback from Global Precision Workshops
⭐⭐⭐⭐⭐ "Incredible Finish" - James W., UK
"We use these on small electronic components. The 0.1mm radius is perfect for sharp internal corners. J740 lasts much longer than competitors."
⭐⭐⭐⭐⭐ "Top Grade Sharpness" - Hiroshi K., Japan
"Tungaloy J740 is very stable. Even at low feeds, it cuts cleanly without rubbing. Japan-made quality at its best."
⭐⭐⭐⭐ "Great for Slender Parts" - Luca M., Italy
"Minimal cutting force with the J10 breaker. It stopped our deflection problems on long, thin stainless shafts."
⭐⭐⭐⭐⭐ "Predictable Wear" - Sarah L., USA
"The tool life is very predictable. We run high-volume medical parts and rarely have to adjust for wear between offsets."
⭐⭐⭐⭐⭐ "Authentic Stock" - Tan H., Singapore
"Original Tungaloy product. Fast shipping and the inserts perform exactly like the catalog specs. Highly recommended."
Technical Tooling Q&A
Q: Can I use this for roughing?
A: No. The 0.1mm radius and sharp J10 geometry are for light finishing only. Roughing will likely cause immediate edge failure.
Q: Is J740 suitable for Aluminum?
A: While it can cut Aluminum, J740 is optimized for Steels and Stainless. For Aluminum, we recommend Tungaloy's uncoated or DLC coated grades for better results.
Q: What tool holder fits this insert?
A: This fits any standard ISO holder for DCGT 11T3 inserts, such as SDJCR or SDNCN styles.
Expert Insight: PVD vs. CVD for Finishing
For precision machining where edge sharpness is king, PVD Coated Carbide (J740) is the superior choice. The thin coating maintains the micro-sharpness of the J10 edge, ensuring your tool life is paired with world-class surface quality.
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