LNMU Insert Extends Tool Life in Alloy Steel

Introduction

Milling alloy steel components often demands high edge strength, stable tool geometry, and consistent wear resistance, especially under dry machining conditions where thermal load is concentrated at the cutting edge.

In this case study, we evaluated the performance of our LNMU0303ZER carbide inserts during dry groove milling of alloy steel cutter disc grooves, and compared the results directly with a leading international brand. The trial focused on tool life, machining stability, and overall cost efficiency.

Workpiece Information

Workpiece

Material: Alloy steel
Part type: Cutter disc with milled grooves

Machining Setup

Operation type: Groove milling
Cooling method: Dry milling
Insert used: LNMU0303ZER
Benchmark tool: International brand insert

Cutting Parameters

Cutting Speed (Vc)	126 m/min
Feed per Tooth (fz)	0.3 mm/rev
Depth of Cut (ap)	0.8 mm

Results & Comparison

Insert Brand	Tool Life (pieces per edge)	Improvement
Our Insert LNMU0303ZER	46 pcs	+40%
Foreign Brand	33 pcs	—

The LNMU0303ZER insert demonstrated a 40% increase in tool life compared with the international brand, while maintaining stable cutting performance under dry machining conditions.

Conclusion

This case confirms that LNMU0303ZER carbide inserts provide a reliable and cost-effective solution for dry groove milling of alloy steel cutter discs.

With extended tool life, consistent machining quality, and improved cost efficiency, our inserts represent a strong alternative to leading international brands in demanding industrial milling applications.