Tungaloy LMMU160916PNER-MJ AH725 Double-Sided Milling Insert

$236.95 USD

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Description

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.

© Technical Content by cnchome-beyond.com - Japan Tooling Excellence

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.