Tungaloy DCGT11T304FN-JS SH725 Turning Insert
Precision Finishing Master | Ultra-Hard SH725 PVD | Made in Japan
What is the most reliable carbide insert for finishing stainless steel parts?
The Tungaloy DCGT11T304FN-JS SH725 is a high-performance precision machining tool specifically engineered for high-accuracy finishing operations. Utilizing the industry-leading SH725 PVD grade, this insert features a high-toughness carbide substrate paired with a smooth, wear-resistant coating that excels in CNC machining of steel, stainless steel, and superalloys. The -JS chipbreaker provides an ultra-sharp cutting edge with a positive rake angle, which is critical for minimizing cutting resistance and achieving mirror-like surface Ra values. This Japan-made indexable turning tool with a 0.4mm corner radius offers the perfect balance between edge strength and surface smoothness. By integrating this long-tail keywords optimized insert into your production line, you ensure exceptional tool life and repeatable dimensional accuracy in every pass.
Decoding the DCGT11T304FN-JS Technical Nomenclature
D
55° Rhombic
C
7° Clearance
G
G Tolerance
T
Hole & Screw
11
11.6mm Edge
T3
3.97mm Thick
04
0.4mm Radius
FN-JS
Finish JS
Technical Specs: Metric vs. Imperial Comparison
| Feature Detail |
Metric Designation |
Imperial Equiv. |
| Product Model |
DCGT11T304FN-JS |
DCGT32.51FN-JS |
| Inscribed Circle (IC) |
9.525 mm |
3/8 inch |
| Corner Radius (RE) |
0.4 mm |
0.016 inch |
How does the SH725 grade and JS chipbreaker improve surface Ra?
The SH725 Grade is a specialized PVD coating known for its high adhesion resistance and ability to maintain a sharp edge under heat. In precision machining, the -JS chipbreaker features a ground-periphery and highly positive rake angle. This configuration curls and breaks chips effectively at low feed rates, preventing workpiece damage from long-stringy chips. For CNC machining of stainless steel or alloy steel parts, the 0.4mm radius on the DCGT11T304FN-JS provides better edge longevity than smaller variants while still allowing for detailed work. This indexable turning tool excels in light-duty finishing, ensuring consistent Ra values shift after shift.
Recommended Cutting Parameters for SH725
-
Cutting Speed (Vc): 70 - 180 m/min (Material dependent)
-
Feed Rate (f): 0.05 - 0.15 mm/rev
-
Depth of Cut (ap): 0.20 - 1.20 mm
*Pro Tip: For medical-grade components, use high-pressure coolant to maximize the tool life of the SH725 grade.*
Feedback from Global Precision Workshops
⭐⭐⭐⭐⭐ "Best for Finish Passes" - Mark T., USA
"The 11T304 is the perfect size for our Swiss-turn lathes. SH725 holds up great on 316 stainless. Surface finish is mirror-like."
⭐⭐⭐⭐⭐ "Incredible Sharpness" - Hans B., Germany
"Tungaloy JS breaker is extremely sharp. Very low cutting forces. It helped solve our vibration issues on slender shafts."
⭐⭐⭐⭐ "Very Stable" - Hiroshi Y., Japan
"Reliable dimensional stability. The G-tolerance is very tight, which is what we need for high-precision components."
⭐⭐⭐⭐⭐ "Great Chip Control" - Luca V., Italy
"No bird-nesting on our alloy steel parts. The chips are small and manageable. Highly recommend SH725 for stainless."
⭐⭐⭐⭐⭐ "Original Quality" - Liam G., UK
"Genuine Tungaloy Japan inserts. Performance is exactly per the technical sheet. Fast shipping and excellent results."
Technical Tooling Q&A
Q: Can I use this for roughing?
A: No. The DCGT11T304 is a precision finishing insert. The sharp edge and 0.4mm radius will fail under heavy material removal. Use for finishing only.
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 tool holder is compatible?
A: This insert fits any standard ISO holder designed for DCGT 11T3 inserts, such as the SDJCR/L series or SDNCN holders.
Expert Insight: PVD vs. CVD for Finishing
For precision machining where edge sharpness is critical, PVD Coated Carbide (SH725) is the superior choice over CVD. The thinner coating keeps the JS edge micro-sharp, ensuring your tool life and surface finish remain world-class.
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