Tungaloy DCGT11T304FN-JS SH730 Turning Insert
High-Precision Finishing Master | Advanced SH730 PVD | Made in Japan
What is the best carbide insert for finishing stainless steel at high speeds?
The Tungaloy DCGT11T304FN-JS SH730 is a premium precision machining solution engineered for the most demanding finishing operations. Featuring the advanced SH730 PVD grade, this insert offers upgraded thermal stability and coating hardness, providing exceptional resistance to crater wear and oxidation. The -JS chipbreaker geometry is a ground-periphery style designed specifically for light-duty finishing passes, ensuring that cutting forces remain low to prevent vibration on slender workpieces. This Japan-made indexable turning tool with a 0.4mm radius is ideal for CNC machining components in medical, automotive, and aerospace sectors. By utilizing this long-tail keywords optimized insert, your shop can achieve sub-micron surface Ra values while maintaining a long tool life in high-velocity environments.
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
Neutral Finish
Technical Specs: Metric vs. Imperial Comparison
| ISO Specification |
Metric Unit |
Imperial Equiv. |
| ISO Model Name |
DCGT11T304FN-JS |
DCGT32.51FN-JS |
| Inscribed Circle (IC) |
9.525 mm |
3/8 inch |
| Corner Radius (RE) |
0.4 mm |
0.016 inch |
Why is the SH730 grade superior for sticky materials?
The SH730 Grade represents the cutting edge of PVD Coated Carbide technology. It is specifically formulated to handle the high temperatures and work-hardening tendencies of Austenitic Stainless Steel and Duplex alloys. The -JS chipbreaker geometry features a ground periphery and a highly positive rake angle. In precision machining, this combination ensures chips are curled and broken efficiently even at very shallow depths of cut. For high-stability CNC machining, the 0.4mm radius of the DCGT11T304FN-JS provides extra edge strength, making it more resistant to chipping during interrupted cuts than smaller radii while still producing a superior surface finish.
Recommended Cutting Parameters for SH730
-
Cutting Speed (Vc): 80 - 200 m/min
-
Feed Rate (f): 0.05 - 0.15 mm/rev
-
Depth of Cut (ap): 0.20 - 1.50 mm
*Optimization Tip: Use high-pressure through-coolant to effectively evacuate chips and fully utilize the thermal resistance of the SH730 coating.*
Feedback from Global Precision Workshops
⭐⭐⭐⭐⭐ "Mirror Surface Finish" - Robert K., USA
"We use these for finishing passes on 304 stainless. The SH730 grade lasts significantly longer than the SH725 in our high-speed cycles. Very clean finish."
⭐⭐⭐⭐⭐ "Excellent Edge Strength" - M. Lehmann, Germany
"Tungaloy Japan quality is obvious here. The 0.4mm radius is very stable, and the JS breaker prevents any bird-nesting issues on our Swiss lathes."
⭐⭐⭐⭐ "Great Stability" - Luca G., Italy
"Predictable tool life and very tight G-tolerances. When you need consistency in precision turning, SH730 is the way to go."
⭐⭐⭐⭐⭐ "High Speed Master" - Sato T., Japan
"Impressive resistance to crater wear. We've increased our cutting speeds by 20% compared to other PVD grades with no loss in accuracy."
⭐⭐⭐⭐⭐ "Original Quality" - Liam J., UK
"Fast delivery of genuine Tungaloy inserts. Performance matches the catalog specs exactly. Perfect for precision alloy steel finishing."
Technical Tooling Q&A
Q: Is SH730 better than SH725 for stainless steel?
A: Yes. SH730 is an upgraded grade with higher hardness and thermal resistance, making it superior for high-speed finishing and difficult, sticky stainless materials.
Q: What is the main benefit of the JS chipbreaker?
A: It is designed for light-duty finishing. The sharp, positive geometry curls chips tightly even at small depths of cut, protecting the surface Ra from scratches.
Q: Can I use this for roughing operations?
A: No. These are strictly for precision finishing. Roughing will likely cause edge fracture due to the ultra-sharp geometry.
Expert Insight: Choosing SH730 for Productivity
In precision machining, heat is the enemy of tool life. While CVD coatings are tough, PVD Coated Carbide like SH730 allows for a much sharper micro-edge. This enables faster cutting speeds without the edge deformation seen in lower-tier grades, keeping your parts within tolerance for longer.
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