Osg 5818500 Square End Mill 0.2953 in 4 Flute Cobalt

Product Description

The OSG 5818500 is a cobalt square end mill designed for milling operations in metal fabrication and machining environments. With a 0.2953-inch cutting diameter, a 0.75-inch length of cut, and a 3/8-inch shank diameter, this tool delivers consistent material removal in ferrous and high-temperature alloy applications. Built from M42 cobalt high-speed steel, it handles the elevated cutting temperatures common in production milling. The 30-degree right-hand spiral flute geometry promotes efficient chip evacuation and smooth cutting action. This end mill is installed and run by machinists and tool-and-die professionals on manual and CNC milling machines.

The OSG 5818500 is suited for general-purpose slot milling, profiling, and peripheral milling in shop and production environments. Its 0.75-inch length of cut covers standard depth requirements for most light-to-medium milling passes. The regular-length configuration keeps tool deflection low during side milling operations. This end mill is appropriate for use in vertical machining centers and knee mills handling ferrous workpiece materials. It is sold as a single unit and carries a minimum order quantity of one.

Key Features

• 0.2953-inch (7.50 mm) cutting diameter with 0.75-inch length of cut
• M42 cobalt high-speed steel construction for heat resistance in ferrous cutting
• 4-flute, right-hand cut and right-hand spiral flute configuration
• 30-degree helix angle for balanced chip evacuation and cutting forces
• 3/8-inch shank diameter with 2.5-inch overall length for standard collet and end mill holder fitment
• Uncoated finish; non-centercutting, regular-length Series 581 design

Compatibility

Designed as an OEM-style replacement and standard production end mill compatible with milling machines and machining centers accepting a 3/8-inch shank end mill holder or collet.

Installation Notes

Installation and tool changes must be performed by qualified machining personnel with the spindle fully stopped and machine power isolated. Secure the shank in a properly sized end mill holder or collet to the depth recommended by the holder manufacturer. Inspect the shank and flutes for damage before mounting. Follow applicable shop safety protocols and machine guarding requirements during operation.