Osg 444-4375 Square End Mill 0.4375 in 4 Flute Carbide

Product Description

The OSG 444-4375 is a solid carbide square end mill designed for precision milling operations in metal fabrication, tooling, and machining environments. Built from micrograin solid carbide, it delivers the hardness and edge retention needed for ferrous and non-ferrous materials. The 0.4375-inch (7/16-inch) cutting diameter pairs with a 30-degree helix angle and four spiral flutes to produce clean cuts and efficient chip evacuation. With a 4-inch overall length and a 0.5-inch shank diameter, this tool seats securely in standard collet chucks and end mill holders. It is installed and operated by machinists and toolmakers in CNC machining centers and manual milling machines.

The 444-4375 is suited for slotting, profiling, and peripheral milling in both production and repair shop environments. The 0.875-inch length of cut supports moderate-depth passes in steel, aluminum, and similar materials. The bright, uncoated finish is appropriate for general-purpose applications where coating is not required. Right-hand cut and right-hand flute direction conform to standard milling conventions. This is a double-end tool from OSG Series 444, making it a practical choice for shops looking to extend usable tool life before regrinding or replacement.

Key Features

• Micrograin solid carbide construction for superior hardness and wear resistance
• 4-flute, 30-degree spiral helix for efficient chip evacuation and smooth surface finish
• Double-end design extends usable tool life
• Right-hand cut and right-hand flute direction for standard milling setups
• Bright, uncoated finish suitable for general-purpose milling applications
• 0.5-inch shank diameter fits standard collet chucks and end mill holders

Compatibility

Designed as an OEM-style replacement end mill for use in standard CNC and manual milling machines accepting a 0.5-inch shank diameter. Part of the OSG Series 444 square end mill line.

Installation Notes

Installation is performed by qualified machinists. Ensure the milling machine spindle is fully powered down and locked out before inserting or removing the tool. Seat the shank fully into the collet or end mill holder and torque the retention hardware according to the machine manufacturer specifications. Inspect the cutting edges for chips or damage before each use, and do not exceed the rated length of cut or depth of pass for this tool diameter.