Osg 4559808 Square End Mill 3/8 in 4 Flute Cobalt Ticn

Product Description

The OSG 4559808 is a 4-flute cobalt square end mill designed for general-purpose milling operations where heat resistance and edge retention are critical. Built to Series 455 specs, it features a 3/8-inch cutting diameter, a 1-1/2-inch length of cut (LOC), and a 3/8-inch shank diameter, with an overall length (OAL) of 3-1/4 inches. The titanium carbonitride (TiCN) coating reduces friction and extends tool life in ferrous and hard-material applications. The 30-degree helix angle promotes efficient chip evacuation and smooth cutting action across a range of workpiece materials.

This end mill is suited for milling operations on steel, stainless, and similar materials where a long-series tool is required for added reach. The fine pitch and right-hand cut with right-hand flute configuration make it appropriate for conventional CNC machining centers and manual knee mills. It is classified as a long-series tool and is typically selected when standard-length end mills cannot reach the required depth or feature location.

Key Features

• Cobalt construction provides superior heat resistance compared to standard HSS end mills
• TiCN coating reduces friction and increases surface hardness for extended tool life
• 4 flutes deliver a fine finish and higher feed rates in ferrous materials
• 30-degree helix angle promotes efficient chip evacuation and reduced cutting forces
• Right-hand cut, right-hand flute configuration for standard CNC and manual mill setups
• Long-series length type for added reach in deep-pocket and extended-reach applications

Compatibility

Designed as an OEM-style replacement or direct application tool for standard 3/8-inch collet and end mill holder setups on CNC machining centers and manual knee mills requiring a long-series cobalt square end mill.

Installation Notes

Installation is performed by qualified machinists or CNC setup technicians. Ensure the spindle is fully stopped and locked out before changing tooling. Seat the shank fully into the collet or end mill holder and torque to the tool holder manufacturer specification. Inspect the TiCN coating before use - chipped or worn coating is a sign the tool should be replaced rather than reground.