Widia 5879209 Square End Mill 5/16 in 4 Flute Solid Carbide

Product Description

The WIDIA 5879209 is a 4-flute, solid carbide square end mill from the Series I4S line, designed for precision milling in demanding metal-cutting applications. Built with a 5/16-inch diameter and a 1/2-inch length of cut, it runs right-hand cutting and flute direction with a 30-degree helix angle. The bright/uncoated finish suits shops that apply their own coatings or work with materials where uncoated carbide performs best. It is centercutting, meaning it can be fed axially as well as radially. Machinists and tool-and-die professionals reach for this style of end mill when close-tolerance slotting, profiling, or peripheral milling is required.

This end mill is suited for milling steel, stainless steel, cast iron, non-ferrous metals, superalloys, and titanium, as well as hard materials. It fits standard machining centers, vertical mills, and CNC machining cells where a 5/16-inch straight-cylindrical shank is accepted. The regular-length geometry keeps tool overhang minimal, which supports rigidity during aggressive cuts in tough workpiece materials. It is a direct-fit replacement in any tool holder accepting a 5/16-inch shank diameter.

Key Features

• Solid carbide construction for high wear resistance and heat tolerance in metal-cutting operations
• 4-flute design balances chip evacuation and surface finish across a wide range of materials
• 30-degree helix angle reduces cutting forces and supports smooth chip flow
• Centercutting geometry allows direct plunge entry into the workpiece
• Bright/uncoated finish compatible with a broad range of workpiece materials including superalloys and titanium
• Straight-cylindrical shank for reliable clamping in collets, end mill holders, and hydraulic chucks

Compatibility

Designed for use with steel, stainless steel, cast iron, non-ferrous metals, superalloys, titanium, and hard materials. Fits any tool holder or collet accepting a 5/16-inch straight-cylindrical shank on CNC machining centers or manual vertical mills.

Installation Notes

Installation is performed by machinists or toolroom technicians. Always power down and lock out the spindle before changing tooling. Seat the shank fully in the collet or holder and torque the retention hardware to the machine or holder specification. Inspect the cutting edges under magnification before use to confirm the tool was not damaged in shipping or storage.