Tungaloy ONMU0705ANPN-MJ AH725 Insert
DoOcto Double-Sided 16-Edge Milling | MJ Chipbreaker | Made in Japan
What is the most economical face milling insert for steel and stainless?
The Tungaloy ONMU0705ANPN-MJ AH725 is a high-productivity indexable milling insert from the elite DoOcto series. This insert features a unique octagonal double-sided design that provides an incredible 16 cutting edges per insert, making it one of the most cost-effective solutions in the industry. The AH725 PVD coated grade offers a perfect synergy of a tough carbide substrate and a wear-resistant coating, excelling in general steel and stainless steel machining. With the MJ medium-duty chipbreaker, it ensures low cutting force and excellent chip control. As a genuine Japan-made face milling insert, it is engineered to deliver high metal removal rates and superior surface finish Ra in rigorous CNC machining environments.
Decoding the ONMU0705ANPN-MJ Nomenclature
O
Octagonal
N
0° Relief
M
Tolerance
U
Fixing
07
Size
05
Thickness
ANPN
Edges
MJ
Breaker
Technical Specs: Metric vs. Imperial Units
| ISO Parameter |
Metric Unit |
Imperial Designation |
| Inscribed Circle (IC) |
15.875 mm |
5/8 inch |
| Insert Thickness (S) |
5.45 mm |
0.215 inch |
| Wiper Width (BS) |
2.0 mm |
0.0787 inch |
| Model Number |
ONMU0705 |
ONMU 544 |
Recommended Cutting Parameters (AH725 Grade)
-
Cutting Speed (Vc): 100 - 250 m/min (Carbon & Alloy Steel)
-
Feed per Tooth (fz): 0.15 - 0.40 mm/t (Optimized for MJ breaker)
-
Max Depth of Cut (Ap): 3.5 mm (Ensure rigid setup)
*Pro Tip: For heavy face milling, ensure the cutter body is fully supported. The 16-edge design allows for extreme cost-per-edge reduction. Dry machining is often preferred for AH725 to maximize thermal resistance.*
Global Verified Customer Reviews
⭐⭐⭐⭐⭐ "Unbeatable Cost Efficiency" - Hans R., Germany
"16 edges on one insert is incredible. We halved our tooling costs for surface milling 1045 steel blocks."
⭐⭐⭐⭐⭐ "Stable and Reliable" - Y. Tanaka, Japan
"Very stable cutting even at 3mm depth of cut. AH725 remains the most versatile grade for our job shop."
⭐⭐⭐⭐ "Great Wall Finish" - Mike D., USA
"The octagonal shape gives a much better finish than square inserts at high feed. Minimal burr on stainless."
⭐⭐⭐⭐⭐ "Long Lasting AH725" - Alessandro V., Italy
"We use these for roughing and finishing. The PVD coating is very tough against thermal shock."
⭐⭐⭐⭐⭐ "Authentic Product" - S. Lee, Singapore
"Fast shipping and genuine Tungaloy inserts. Precision is consistent across all 16 edges."
Technical Tooling Q&A
Q: Can I use ONMU0705 for 90-degree shoulder milling?
A: No, the octagonal shape is designed specifically for 45-degree lead angle face milling. For 90-degree shoulders, please use the TungForce-Rec series.
Q: What is the benefit of a 45-degree lead angle?
A: It thins the chips, allowing for higher feed rates and directing cutting forces toward the spindle, which increases stability and tool life.
Q: How do I know when to rotate the insert?
A: Each edge is numbered on the insert. Simply rotate to the next number when you notice flank wear or a drop in surface finish quality.
Expert Insight: 16-Edge Value Proposition
In CNC face milling, the ONMU0705 with AH725 grade provides a massive advantage in throughput. By utilizing 16 edges, shops can maintain longer unattended runs. The 45-degree angle reduces vibration, protecting your machine spindle while delivering precision machining results on every pass.
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