Tungaloy AOMT180508PDPR-MJ AH725 Milling Carbide Insert (10pcs) - BEYOND

Tungaloy AOMT180508PDPR-MJ AH725 Milling Carbide Insert (10pcs)

$140.10 USD

Price shown is a starting point. Contact us for a precise quote based on your requirements.

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Description

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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Technical FAQ & Buying Guide

Are your carbide inserts interchangeable with major brands like Sandvik, Iscar, or Kennametal?

Absolutely. Our CNC carbide inserts (including CNMG, WNMG, DNMG, and APMT series) are manufactured strictly adhering to international ISO/ANSI specifications. A CNMG 120408 from OYYU BEYOND will flawlessly fit any standard turning tool holder or indexable tool from major global brands like Sandvik Coromant, Kennametal, Iscar, Walter, or SECO, providing a highly cost-effective premium alternative without sacrificing tolerance or tool life.

How do I choose the correct insert grade and chipbreaker for machining Stainless Steel (M) vs. Carbon Steel (P)?

We offer optimized CVD and PVD multi-layer coatings for different ISO material groups:

  • For Carbon/Alloy Steel (ISO P): Choose our thick multi-layer CVD coated grades (e.g., Al2O3 + TiN). They provide exceptional crater wear resistance and thermal barriers during high-speed dry or wet roughing.
  • For Stainless Steel (ISO M): Choose our nano-structured PVD coated grades with sharp, positive chipbreakers (like -TM or -MA). This combination prevents work hardening and effectively controls sticky chips.
What are the recommended cutting speed (Vc) and feed rate (f) parameters to maximize tool life?

The optimal cutting parameters vary depending on the workpiece hardness and operation type:

  • For General Steel Turnings: Recommended cutting speed ($V_c$) ranges from 150 to 280 m/min, with a feed rate ($f$) of 0.15 to 0.45 mm/rev.
  • For Stainless Steel Finishing: Recommended cutting speed ($V_c$) is 120 to 200 m/min, with a feed rate ($f$) of 0.10 to 0.25 mm/rev.Always adjust parameters based on early wear patterns: increase $V_c$ if built-up edge occurs, or reduce $V_c$ if severe flank wear is observed.
Do you offer bulk discounts or wholesale pricing for machine shops and distributors?

Yes, we support machine shops, distributors, and global buyers with tiered wholesale pricing and competitive volume discounts. We also provide OEM custom manufacturing solutions for tool holders and carbide inserts based on your technical drawings. Contact our team to request a quick B2B quotation.

What is your international shipping policy and typical lead time for orders?

We provide secure worldwide express shipping (via DHL, FedEx, and UPS) with specialized, vibration-proof industrial packaging to ensure tools arrive in perfect condition. In-stock items are dispatched within 24-48 hours, while custom or bulk orders typically have a stable lead time of 15-25 days.

How do you guarantee the quality and tolerance precision of your CNC tools?

All our cutting tools and tool holders are manufactured strictly in accordance with ISO 9001 and international industrial standards. Every batch undergoes 100% rigorous quality control testing using high-precision optical measuring equipment to ensure reliable tool life and stable performance in continuous mass production.