TUNGALOY AOMT180508PDPR-MJ AH725
High-Feed Milling Specialist | MJ Chipbreaker | AH725 PVD Grade
Product Overview
The Tungaloy AOMT180508PDPR-MJ AH725 is a high-efficiency milling carbide insert engineered for heavy-duty face milling and shoulder milling operations. Designed for high metal removal rates (MRR), this insert features the specialized MJ chipbreaker for excellent chip evacuation in medium-to-heavy cutting conditions. The AH725 PVD coated grade provides exceptional thermal stability and wear resistance, making it the industrial standard for machining stainless steel, carbon steel, and alloy steels. Whether you are performing roughing or semi-finishing, this indexable milling tool delivers the reliability and tool life required for modern CNC machining environments. Made in Japan, it ensures the tightest tolerances in precision machining.
Technical Designation Breakdown
A
Shape
O
Clearance
M
Tolerance
T
Fixing
18
Size
05
Thick
08
Radius
MJ
Breaker
Technical Specifications: Metric vs. Imperial
| Feature |
Metric (Standard) |
Imperial Equivalent |
| Insert Size |
18 mm |
0.708 inch |
| Thickness |
5.3 mm |
0.208 inch |
| Corner Radius |
0.8 mm |
0.031 inch |
AH725 Grade: The All-Rounder
The AH725 grade is Tungaloy's most versatile PVD coated carbide. It features a high-AlTiN coating on a tough carbide substrate. This long-tail keywords favorite is optimized for preventing chipping during interrupted cuts, making it perfect for milling applications where heat and mechanical shock are constant factors in CNC machining.
MJ Chipbreaker: Medium Machining Specialist
The MJ geometry is designed with a balanced cutting edge strength and sharpness. It aggressively manages chip formation to prevent heat buildup on the workpiece, ensuring a stable cutting process even at higher feed rates.
Recommended Cutting Parameters
Optimized for P (Steel) and M (Stainless Steel):
-
Cutting Speed (Vc): 120 - 220 m/min (390 - 720 SFM)
-
Feed per Tooth (fz): 0.10 - 0.25 mm/t (0.004 - 0.010 ipt)
-
Depth of Cut (ap): Up to 12mm depending on cutter diameter
*Pro Tip: Use air blast rather than coolant when milling hardened steels with AH725 to prevent thermal cracking of the insert.*
Global Verified Reviews
⭐⭐⭐⭐⭐ "Workhorse for Stainless" - Matthias K., Germany
"The AH725 grade is my first choice for 304 and 316 milling. I get 30% more tool life compared to my previous brand. Very predictable wear."
⭐⭐⭐⭐⭐ "Great Chip Evacuation" - Hiroshi S., Japan
"The MJ chipbreaker really works for deep pocket milling. Chips don't get stuck and the surface finish is excellent."
⭐⭐⭐⭐ "Tough in Interrupted Cuts" - Mark L., USA
"Very reliable. I've used these on messy welds and the inserts held up without shattering. Tungaloy Japan quality."
⭐⭐⭐⭐⭐ "Excellent High Feed" - Luca G., Italy
"I run these at 0.2mm/tooth and they just keep going. Reduced my cycle time by 15% in alloy steel parts."
⭐⭐⭐⭐⭐ "Quick Shipping, Quality Product" - David O., UK
"Original AOMT inserts. The radius 0.8 is perfect for our standard shoulder milling. Will buy again."
Technical Q&A
Q: Which milling cutter bodies are compatible with this insert?
A: These inserts fit Tungaloy Tung-Tri and DoTriple-Mill series designed for size 18 inserts.
Q: Is AH725 good for dry machining?
A: Yes. AH725 is excellent for dry milling in steel. The PVD coating acts as a thermal barrier to protect the carbide substrate.
Q: What is the difference between MJ and ML chipbreakers?
A: **MJ** is for medium machining with a stronger edge. **ML** is for light machining and is sharper for lower horsepower machines.
Expert Machining Tip: PVD vs. CVD for Milling
For milling operations, **PVD grades** like **AH725** are preferred over CVD because they maintain a sharper edge and have higher compressive stress, which resists the thermal and mechanical shocks of intermittent cutting. This leads to higher accuracy and better tool life in precision machining.
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