Osg 404-0939 Square End Mill 3/32 in 4 Flute Solid Carbide

Product Description

The OSG 404-0939 is a solid carbide square end mill designed for precision milling operations in metalworking and machining environments. With a 3/32 inch (0.0938 inch) cutting diameter and a 3/8 inch length of cut, this tool handles slotting, profiling, and peripheral milling in tight geometries. The 4-flute configuration provides a good balance of chip evacuation and surface finish. A 30-degree helix angle reduces cutting forces and supports smoother engagement in a variety of workpiece materials. This end mill is single-end, uncoated, and built for use in CNC machining centers and manual mills operated by machinists and tool-and-die professionals.

This end mill is suited for general-purpose milling in ferrous and non-ferrous materials where tight tolerances and small-diameter tooling are required. The centercutting design allows plunge entry, expanding versatility for applications that require drilling into a workpiece before peripheral passes. The right-hand cut and right-hand flute configuration matches the standard spindle rotation of most CNC and manual milling equipment. It is a practical choice for die makers, mold shops, and precision machining operations working with small-feature geometry.

Key Features

• 3/32 inch cutting diameter (0.0938 inch) for small-feature and tight-tolerance milling
• Solid carbide construction for rigidity and wear resistance
• 4-flute design balances material removal rate with surface finish quality
• 30-degree helix angle reduces cutting forces during engagement
• Centercutting geometry allows direct plunge entry without a pre-drilled pilot hole
• Right-hand cut and right-hand flute for standard spindle compatibility
• Uncoated finish suitable for use with cutting fluid in a range of materials

Compatibility

Designed as a general-purpose replacement or direct-use solid carbide square end mill for CNC machining centers and manual mills requiring a 1/8 inch shank diameter and 3/32 inch cutting diameter.

Installation Notes

Installation is performed by qualified machinists using an appropriate collet or end mill holder sized to accept a 1/8 inch shank. Ensure the spindle is fully stopped and locked before tool changes. Confirm runout with a dial indicator after seating to protect tool life and part accuracy. Follow shop-standard feeds, speeds, and coolant practices for solid carbide tooling in the workpiece material being cut.