Tungaloy LNMU0303ZER-ML AH130 Insert
TungForce-Rec Double-Sided 4-Edge | ML Sharp Chipbreaker | Made in Japan
What is the best milling insert for gummy stainless steel and titanium?
The Tungaloy LNMU0303ZER-ML AH130 is a specialized indexable milling insert engineered for light to medium-duty machining in difficult-to-cut materials. Featuring the advanced AH130 PVD coated grade, this insert offers exceptional resistance to thermal cracking and notch wear, making it the industry standard for 300-series stainless steel and titanium alloys. The ML chipbreaker is designed with a sharper rake angle to reduce cutting resistance and prevent work hardening in gummy materials. With its unique double-sided 4-edge structure, this Japan-made milling insert provides high cost-efficiency and superior surface finish Ra for precision CNC machining cycles.
Decoding the LNMU0303ZER-ML Technical Nomenclature
L
90° Shape
N
0° Relief
M
Tolerance
U
Fixing
03
Size
03
Thickness
ZER
General
ML
Light Cut
Technical Specs: Metric vs. Imperial Units
| ISO Parameter |
Metric Unit |
Imperial Designation |
| Cutting Edge Length |
3.5 mm |
0.138 inch |
| Insert Thickness |
3.18 mm |
1/8 inch |
| Inscribed Circle (IC) |
6.35 mm |
1/4 inch |
| Corner Radius |
0.4 mm |
0.0157 inch |
Recommended Cutting Parameters (AH130 Grade)
-
Cutting Speed (Vc): 40 - 100 m/min (Titanium Alloys) | 60 - 150 m/min (Stainless Steel)
-
Feed per Tooth (fz): 0.10 - 0.25 mm/t (Optimized for ML breaker)
-
Max Depth of Cut (Ap): 0.5 - 0.8 mm (Ideal for light feed logic)
*Pro Tip: For machining titanium, use a generous supply of high-pressure coolant to manage heat. The AH130 grade is specifically formulated to resist the high thermal loads of aerospace machining.*
Global Verified Customer Reviews
⭐⭐⭐⭐⭐ "Game Changer for 316 Stainless" - Stefan H., Germany
"The ML chipbreaker makes such a difference. We were struggling with built-up edge, but this insert stays clean and sharp."
⭐⭐⭐⭐⭐ "Top Choice for Titanium" - Takumi K., Japan
"Consistent tool life in Aerospace alloys. AH130 grade is very reliable for overnight CNC production."
⭐⭐⭐⭐ "Smooth Cutting Action" - James W., USA
"Low vibration and very low power consumption on our machine. The surface finish on the shoulder is excellent."
⭐⭐⭐⭐⭐ "Economic 4-Edges" - L. Bernard, France
"Having 4 edges on such a small insert is great for the budget. No quality trade-off either."
⭐⭐⭐⭐⭐ "Genuine Japanese Quality" - S. Gupta, Singapore
"Fast delivery and original Tungaloy parts. The precision is unmatched for small batch high-value parts."
Technical Tooling Q&A
Q: Is AH130 better than AH725 for stainless steel?
A: AH130 is superior for austenitic stainless steel and titanium due to its increased thermal resistance. AH725 is a better all-rounder for general steel and cast iron.
Q: What is the main benefit of the ML chipbreaker?
A: The ML is a 'Light Cut' geometry. It is sharper than the MJ breaker, which helps avoid work-hardening on the surface of stainless parts and reduces spindle load.
Q: Which cutters do I need for LNMU0303?
A: It is compatible with the Tungaloy TungForce-Rec series (EXLS or TXP holders). Always match the seat size for Series 03 inserts.
Expert Insight: AH130 Grade Logic
In high-performance milling, AH130 is a specialized PVD grade designed to handle the localized heat and high pressure of Superalloys (S) and Stainless (M). By using the ML breaker, you ensure the sharpest entry possible into the material, which is critical for maintaining tool life and tight tolerances in CNC machining.
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