Tungaloy LMMU160916PNER-MJ AH725 Insert
TungForce-Rec Double-Sided Milling | MJ Chipbreaker | Made in Japan
What is the best double-sided milling insert for heavy shoulder milling?
The Tungaloy LMMU160916PNER-MJ AH725 is a high-efficiency indexable milling insert from the renowned TungForce-Rec line. Designed with a robust double-sided structure, it offers 4 economical cutting edges while maintaining the rigidity of a single-sided insert. The AH725 PVD coated grade is a versatile powerhouse, combining a tough carbide substrate with a multilayered (Ti, Al)N coating, making it exceptional for machining general steels and stainless steels. The MJ chipbreaker is specifically tailored for medium-duty cutting, providing an ideal balance between sharpness and edge strength in CNC milling operations. This Japan-made milling insert is the professional choice for achieving high metal removal rates (MRR) with superior surface finish.
Decoding the LMMU160916PNER-MJ Nomenclature
L
Shape
M
Clearance
M
Tolerance
U
Fixing
16
Length
09
Thickness
16
Radius
MJ
Breaker
AH725
Grade
Technical Specs: Metric vs. Imperial Conversion
| ISO Parameter |
Metric Designation |
Imperial Designation |
| Cutting Edge Length |
16.0 mm |
0.630 inch |
| Insert Thickness |
9.53 mm |
3/8 inch |
| Corner Radius (RE) |
1.6 mm |
1/16 inch |
| Wiper Width (BS) |
1.2 mm |
0.047 inch |
Recommended Cutting Parameters (AH725 Grade)
-
Cutting Speed (Vc): 100 - 250 m/min (Carbon/Alloy Steel)
-
Feed per Tooth (fz): 0.10 - 0.25 mm/t (Optimized for MJ Chipbreaker)
-
Machining Type: Shouldering, Slotting, and Ramping.
*Pro Tip: Use AH725 for wet or dry cutting. For maximum tool life in stainless steel, internal coolant is highly recommended.*
Global Verified Customer Reviews
⭐⭐⭐⭐⭐ "Economic and Tough" - Dieter B., Germany
"4 edges per insert makes this very cost-effective. The AH725 grade handles our 4140 steel blocks perfectly."
⭐⭐⭐⭐⭐ "Great for Stainless" - Kenji Y., Japan
"I use these for 304 stainless milling. The MJ breaker handles chips better than any competitors I've tried."
⭐⭐⭐⭐ "Heavy Removal Rates" - Mark S., USA
"We pushed the feed rate on a large fixture job. The inserts didn't chip even with heavy interrupted cuts."
⭐⭐⭐⭐⭐ "Perfect Surface Finish" - Carlos M., Mexico
"The 1.6mm radius gives a very strong corner and a surprisingly smooth wall finish on our shoulder mill."
⭐⭐⭐⭐⭐ "Fast Delivery & Genuine" - William R., UK
"Authentic Tungaloy stock. The PVD coating AH725 is a lifesaver for our general machine shop."
Technical Tooling Q&A
Q: Can I use this for high-speed milling in aluminum?
A: AH725 is a PVD coated carbide designed for steel and stainless. For aluminum, we recommend an uncoated grade like KS05F for better chip flow.
Q: Is the LMMU16 insert compatible with standard 90-degree holders?
A: Yes, it is designed for the TungForce-Rec series of shoulder mills to achieve precise 90-degree shoulders.
Q: What makes the MJ chipbreaker different?
A: The MJ geometry is a general-purpose breaker that combines a sharp rake angle with a stable land to prevent edge chipping during medium-range milling.
Expert Tooling Tip: Grade Optimization
In high-performance milling, AH725 is the "Swiss Army Knife" of grades. It offers superior resistance to thermal cracking. For long-running production in stable steel cutting, you might compare this with CVD grades, but for versatile CNC shops, AH725 remains the most reliable performer.
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