Tungaloy DCGT11T304N-JS AH725 Turning Insert
Precision Finishing Master | AH725 Multi-Purpose PVD | Made in Japan
What is the most reliable insert for finishing steel and stainless steel?
The Tungaloy DCGT11T304N-JS AH725 is a high-performance precision machining solution engineered for finishing operations where edge toughness and surface quality are paramount. Utilizing the versatile AH725 PVD grade, this insert features a high-toughness carbide substrate paired with a wear-resistant coating, making it ideal for CNC machining of carbon steel, alloy steel, and stainless steel. The -JS chipbreaker is specifically optimized for light-duty finishing, providing a sharp cutting edge that reduces cutting resistance and prevents the formation of built-up edge (BUE). This Japan-made indexable turning tool with a 0.4mm corner radius offers enhanced edge strength compared to smaller radii, ensuring extended tool life and stable dimensional accuracy. By integrating this long-tail keywords optimized insert into your production, you achieve superior surface finishes even in demanding conditions.
Decoding the DCGT11T304N-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
N-JS
Finishing JS
Technical Specs: Metric vs. Imperial Comparison
| Standard Detail |
Metric Designation |
Imperial Designation |
| ISO / ANSI Model |
DCGT11T304N-JS |
DCGT32.51-JS |
| Inscribed Circle (IC) |
9.525 mm |
3/8 inch |
| Thickness (S) |
3.97 mm |
5/32 inch |
| Corner Radius (RE) |
0.4 mm |
0.016 inch |
How does the AH725 grade and JS chipbreaker improve machining stability?
The AH725 PVD Grade is a versatile coating designed for high-precision finishing. It offers excellent balance between wear resistance and fracture toughness. In precision machining, the -JS chipbreaker utilizes a highly positive rake angle to curl chips efficiently at low feeds, preventing surface damage. The 0.4mm corner radius on the DCGT11T304N-JS provides better edge longevity than smaller variants, making it suitable for slightly higher feed rates while maintaining an exceptional surface Ra. This indexable turning tool is a staple for CNC machining workshops that require reliable, long-lasting inserts for finishing steels and stainless alloys.
Recommended Cutting Parameters for AH725
-
Cutting Speed (Vc): 70 - 190 m/min
-
Feed Rate (f): 0.05 - 0.15 mm/rev
-
Depth of Cut (ap): 0.2 - 1.5 mm
*Pro Tip: Ensure stable workholding and use high-pressure coolant to maximize the performance of the AH725 grade.*
Feedback from Global Precision Workshops
⭐⭐⭐⭐⭐ "Workhorse Insert" - Robert T., USA
"The 11T304 is our go-to for finishing alloy steels. The AH725 grade is incredibly stable and the tool life is predictable shift after shift."
⭐⭐⭐⭐⭐ "Excellent Chip Breaking" - Hans L., Germany
"The JS breaker is fantastic. No more 'bird nests' when turning stainless steel. The surface finish is mirror-like."
⭐⭐⭐⭐ "Very Sharp Edge" - Luca G., Italy
"Tungaloy quality is always top-notch. Sharp edges and very consistent G-tolerance for precision work."
⭐⭐⭐⭐⭐ "Perfect for Swiss Machining" - Akira H., Japan
"Using these on our Citizen lathes. The dimensional stability is excellent. Very reliable for finishing small components."
⭐⭐⭐⭐⭐ "Authentic Quality" - Mark S., UK
"Original Tungaloy inserts delivered on time. Performance matches the catalog specs exactly. High recommended for stainless."
Technical Tooling Q&A
Q: Can I use this insert for medium cutting?
A: While it is a finishing insert, the 0.4mm radius and AH725 grade allow for light-to-medium finishing. For heavy roughing, we suggest a dedicated roughing geometry.
Q: What materials are best for the AH725 grade?
A: AH725 is a multi-purpose grade. It is excellent for Steel (P), Stainless Steel (M), and Heat Resistant Alloys (S).
Q: Which tool holder do I need?
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 Coating Advantage
For precision machining where surface finish is critical, PVD Coated Carbide (AH725) is superior to CVD. The thinner, smoother coating allows for a much sharper cutting edge, which is essential for low-force finishing and maximizing tool life.
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