Osg 404-0781 Square End Mill 5/64 in 4 Flute Solid Carbide

Product Description

The OSG 404-0781 is a solid carbide square end mill designed for precision milling in metalworking and machining applications. Built from micrograin carbide, this 4-flute tool features a 5/64 inch (0.0781 inch) cutting diameter with a 1/4 inch length of cut and a 30-degree helix angle. The right-hand cut, right-hand spiral flute geometry promotes efficient chip evacuation. Centercutting capability allows the tool to plunge directly into the workpiece. At 1-1/2 inches overall length with a 1/8 inch shank diameter, this end mill fits standard collets and tool holders used in CNC and manual milling operations.

This end mill is suited for slotting, profiling, and pocket milling in ferrous and non-ferrous materials. Its regular length configuration and uncoated micrograin carbide construction make it a reliable choice for shops running tight-tolerance work on small features. Machinists and CNC operators in job shops, tool rooms, and production environments commonly specify OSG Series 404 tools for small-diameter work requiring consistent edge integrity and dimensional accuracy.

Key Features

• Solid micrograin carbide construction for rigidity and wear resistance in small-diameter cutting
• 4-flute design increases feed potential compared to 2-flute tools in finishing operations
• 30-degree helix angle promotes smooth cutting action and effective chip flow
• Centercutting geometry allows direct plunge entry without a pilot hole
• Right-hand cut and right-hand flute — standard orientation for conventional CNC spindle rotation
• Uncoated finish suitable for use with cutting fluids across a range of workpiece materials

Compatibility

Designed as an OEM-style solid carbide square end mill in the OSG Series 404 regular-length line, compatible with 1/8 inch collets and tool holders in CNC machining centers and manual milling machines.

Installation Notes

Installation is performed by qualified machinists or CNC setup technicians. Ensure the machine spindle is fully stopped and the tool holder is clean and free of debris before seating the shank. Verify collet runout is within acceptable tolerance for the cutting diameter before beginning a cut. Follow machine tool manufacturer guidelines for tool projection, feed rate, and spindle speed when using small-diameter carbide end mills.