Widia 5879131 Square End Mill 1/8 in 4 Flute Solid Carbide

Product Description

The WIDIA 5879131 is a 4-flute solid carbide square end mill from the I4S series, designed for precision milling in demanding metalworking applications. With a 1/8 inch cutting diameter and a TiAlN coating, it delivers high heat resistance and extended tool life at elevated cutting speeds. The 30-degree right-hand helical flute geometry promotes efficient chip evacuation and smooth surface finishes. This end mill is center-cutting, allowing plunge entry, and features a straight cylindrical shank for secure toolholder engagement. It is primarily used by machinists and CNC operators in job shops, production facilities, and toolroom environments.

The 5879131 is built for milling steel, stainless steel, cast iron, non-ferrous metals, superalloys, titanium, and hard materials. The 1/2 inch length of cut and 1-1/2 inch overall length make it well suited for finishing passes, slotting, and profiling in tight geometries or small-part work. The regular length profile fits standard toolholders used on vertical machining centers and CNC mills where small-diameter tooling is required.

Key Features

• 1/8 inch cutting diameter with 1/2 inch length of cut for small-feature milling
• 4-flute solid carbide construction for rigidity and wear resistance
• TiAlN coating provides thermal barrier and oxidation resistance at high cutting speeds
• 30-degree right-hand helix promotes chip flow and reduces cutting force
• Center-cutting geometry allows direct plunge entry without pre-drilling
• Straight cylindrical shank compatible with standard collet and toolholder systems

Compatibility

Designed as a solid carbide square end mill replacement suitable for use in CNC machining centers and manual mills equipped with standard 1/8 inch collets or toolholders. Compatible workpiece materials include steel, stainless steel, cast iron, non-ferrous metals, superalloys, titanium, and hard materials per ISO material codes P, M, K, N, S, and H.

Installation Notes

Installation should be performed by a qualified machinist or CNC operator. Ensure the machine spindle is fully stopped and the tool changer or collet is de-energized before inserting or removing the end mill. Use a torque wrench and the collet manufacturer's specified seating procedure to secure the shank without over-tightening. Verify runout with a dial indicator before initiating cuts on close-tolerance features.