Tungaloy DCGT11T302FN-JS SH725 Turning Insert
High-Precision Finishing Master | SH725 PVD Grade | Made in Japan
What is the best insert for mirror-finish turning on stainless steel?
The Tungaloy DCGT11T302FN-JS SH725 is a premium precision finishing turning insert specifically engineered for high-accuracy operations in stainless steel, alloy steel, and heat-resistant superalloys. Utilizing the high-performance SH725 PVD grade, this insert features a specialized tough carbide substrate and a smooth, ultra-thin coating that prevents chip welding and built-up edge (BUE). The -JS chipbreaker provides a sharp cutting edge and optimal chip control at low depths of cut, which is essential for achieving superior surface Ra values. This indexable turning tool is manufactured in Japan to the strictest G-tolerance standards, ensuring every CNC machining cycle remains consistent. By incorporating this long-tail keywords optimized insert, your workshop can maximize tool life and process reliability during critical finishing passes.
Decoding the DCGT11T302FN-JS Technical Nomenclature
D
55° Rhombic
C
7° Clearance
G
G Tolerance
T
Hole & Screw
11
11.6mm Edge
T3
3.97mm Thick
02
0.2mm Radius
FN-JS
Finish Neutral
Technical Specs: Metric vs. Imperial Comparison
| Feature Detail |
Metric Designation |
Imperial Designation |
| ISO / ANSI Model |
DCGT11T302FN-JS |
DCGT32.50.5-JS |
| Inscribed Circle (IC) |
9.525 mm |
3/8 inch |
| Corner Radius (RE) |
0.2 mm |
0.008 inch |
How does the SH725 grade and JS chipbreaker enhance precision?
The SH725 Grade is a specialized PVD-coated carbide that balances edge sharpness with extreme toughness. In precision machining, the -JS chipbreaker features a ground-periphery and highly positive rake angle. This configuration reduces cutting resistance significantly, preventing workpiece deflection on slender parts. For CNC machining of small parts, the 0.2mm radius offers a perfect compromise between edge strength and the ability to machine intricate corners. This indexable turning tool excels in light-duty finishing, ensuring that heat is carried away by the chip, protecting the integrity of the workpiece surface.
Recommended Cutting Parameters for SH725
-
Cutting Speed (Vc): 60 - 160 m/min
-
Feed Rate (f): 0.03 - 0.12 mm/rev
-
Depth of Cut (ap): 0.10 - 1.0 mm
*Pro Tip: For the best surface results, use high-quality coolant to maintain the sharp edge of the SH725 grade.*
Feedback from Global Precision Workshops
⭐⭐⭐⭐⭐ "Mirror Finish Every Time" - Mark T., USA
"We turn small medical shafts using SH725. The surface finish is incredible, and we've significantly reduced our secondary polishing time."
⭐⭐⭐⭐⭐ "Incredible Edge Life" - Stefan H., Germany
"Tungaloy's JS breaker is very sharp. Even on difficult alloys, the dimensional stability is perfect for the entire batch."
⭐⭐⭐⭐ "Very Reliable" - Hiroshi K., Japan
"Consistent quality from Tungaloy. The 0.2mm radius is ideal for our precision components. Highly stable grade."
⭐⭐⭐⭐⭐ "Great Chip Control" - Luca M., Italy
"The JS geometry breaks chips perfectly at light depths. No more bird-nesting on our stainless steel parts."
⭐⭐⭐⭐⭐ "Original and High Quality" - Sarah B., UK
"Genuine Japan-made inserts. The performance is exactly what you expect from Tungaloy. Fast shipping and great results."
Technical Tooling Q&A
Q: Can I use this for roughing?
A: No. The DCGT11T302 is a precision finishing insert. The sharp edge and SH725 grade are optimized for finishing. Roughing will cause premature edge failure.
Q: Why choose the JS chipbreaker for finishing?
A: The JS breaker is specifically designed for small depths of cut, providing better chip breaking and a smoother surface than general-purpose breakers.
Q: What is the benefit of the Neutral (N) orientation?
A: Neutral inserts offer versatility in tool pathing and can sometimes be utilized in both left and right-hand holders depending on the operation.
Expert Insight: PVD vs. CVD for Finishing
For precision machining where edge sharpness is critical, PVD Coated Carbide (SH725) is the superior choice. The thin PVD coating allows the sharp JS geometry to cut cleanly, ensuring your tool life and surface finish remain world-class.
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