Osg 404-312505 Square End Mill 5/16 Inch 4 Flute Carbide

Product Description

The OSG 404-312505 is a solid carbide square end mill designed for precision milling operations in metalworking and machining applications. It measures 5/16 inches in diameter with a 13/16-inch length of cut and a 2-1/2-inch overall length. The four-flute, spiral-flute geometry combined with a 30-degree helix angle promotes efficient chip evacuation and smooth cutting action. A TiN (titanium nitride) finish adds surface hardness and wear resistance. The micrograin carbide construction delivers rigidity and edge retention in demanding cuts. This tool is installed and operated by machinists and tooling technicians on CNC mills and manual milling machines.

The 404-312505 is suited for slotting, profiling, and peripheral milling in ferrous and non-ferrous materials. Its regular-length geometry makes it a practical choice for general-purpose work where extended reach is not required. The centercutting capability allows plunge entry directly into the workpiece, adding versatility across a range of milling routines. The right-hand cut and right-hand flute configuration is standard for conventional spindle setups.

Key Features

• Solid micrograin carbide construction for rigidity and edge retention
• TiN finish for increased surface hardness and extended tool life
• 4-flute spiral design with 30-degree helix for efficient chip evacuation
• Centercutting geometry allows direct plunge entry
• Right-hand cut and right-hand flute for use with standard spindle direction
• Regular length profile suits general-purpose milling setups

Compatibility

Designed as a general-purpose square end mill compatible with CNC and manual milling machines accepting a 5/16-inch straight shank toolholder or collet.

Installation Notes

Installation should be performed by a qualified machinist or tooling technician. Secure the shank in a properly sized collet or end mill holder and verify runout before engaging the cut. Ensure the spindle is fully stopped and the machine is powered down before changing or inspecting tooling. Follow the machine manufacturer's speed and feed recommendations for the workpiece material and tool diameter.